Thursday, March 13, 2014

Rue Anemone

Anemonella thalictrioides ( Rue Anemone )
A perennial, reaching a maximum height of 8 inches, that is native to forests of eastern North America ( from Minnesota to New Hampshire; south to eastern Oklahoma to nothwest Florida ).
The attractive ferny foliage is blue-green. During dry summers, the foliage will go dormant, reappearing the following year.
The white to pale pink flowers are borne during early to mid spring.
Hardy zones 3 to 8 in partial to full shade. Propagation is from seed and it often self seeds.


* photos taken on March 28 2010 @ U.S. National Arboretum, D.C.


* photos taken by Jennifer Anderson @ USDA-NRCS PLANTS Database

Monday, February 17, 2014

Saruma

Saruma henryi
A rare, robust, rhizomatous, upright, bushy, herbaceous perennial, reaching up to 3.5 x 3 ( rarely over 2 ) feet, that is native to dense forests of China. It is a close relative of Aristolochia.
The felted, cordate leaves are up to 6 x 5 inches. The luxuriant bright green foliage is very attractive throughout the growing season.
The yellow flowers, up to 1 inch wide, are borne late spring then in succession over a long season lasting through late summer.
Hardy zones 3 to 8 in partial to full shade on well drained soil. It is very easy to grow, it is tolerant of dry shade, acidic and alkaline soils and even thrives in harsh climates such as Kansas City. It is deer, insect and disease resistant.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

Tuesday, January 7, 2014

Old World Maples

Acer



Acer acuminatum
A medium size often multi stemmed tree native to the western Himalayas. The largest on record is 52 feet in height and 25 inches in diameter.
The leaves are up to 6 x 5 inches in size, have 3 to 5 elongated lobes and are borne on red stalks. They are are reddish at first turning to fresh green then to orange in fall. The winged fruits are 1.5 inches in length.
The bark is green.
Hardy zones 5 to 8

Acer argutum

Native to Japan ( Shikoku & Honshu ). It is a slow growing often multi-stemmed tree. It can reach up to 27 feet in height in 20 years ( and rarely grows much larger ) and the fastest growth rate recorded is 2 feet. The largest tree on record is 40 x 20 feet with a trunk diameter of 16 inches.
The sharply 5-lobed leaves are up to 5 x 5 inches in size and have a prominent network of veins. They are pale green in summer and turn to orange-gold in fall.
This tree is rare because viable seed is also rare.
Hardy zones 4 to 8.

Acer barbinerve
A moderate growing small tree native to Manchuria, Korea and eastern Russia. Some records include: largest tree - 33 x 40 feet; fastest growth rate - 2.5 feet. This tree appears much like our native Acer spicatum ( Mountain Maple ).
The coarsely-toothed leaves are up to 5 x 5 inches in size and are dark green in summer turning to bright yellow in fall.
The bark is smooth and gray. The bright red stems are very showy.
Hardy in zones 4 to 7 it should be tested in zone 3. For now I will say it is cold hardy to -30 F and possibly colder. Easy to grow and rarely bothered by pests or disease.

Acer buergerianum ( Trident Maple )

From east China & Korea, this excellent landscape tree typically reaches around 60 feet with the largest trees recorded up to 100 x 75 feet with trunk diameters to 4.5 feet. A very large tree of 70 x 76 x 3.4 feet grows at Morris Arboretum in Philly, PA. Fast growing; some records include; fastest recorded growth rate - 4 feet; 5 years - 21 x 13 feet with 7 inch trunk diameter ( more usually 20 x 12 feet in 8 years ).
The leaves are up to 4 x 4 inches and have 3 short lobes. They are very glossy green above, and blue green below. It is very early in leaf and the leaves turn vivid red late into the fall.
Abundant clusters of winged keys often persist through the winter.
The orangy bark is flaky and attractive.
The Trident Maple grows in any soil; wet or dry. It is very heat and drought tolerant and leaf scorch is rare. The Trident Maple is even known to withstand temperatures as high as 117 F making it useful in the South where Norway Maple performs poorly. Indeed this Maple thrives in the almost tropical summers of Norfolk, Virginia as well as Atlanta, Georgia or Little Rock, Arkansas.
Pest free, strong wooded and good in sun or part shade. Also grows well in just about any soil wet or dry and also tolerant of heat and drought.
It is hardy from zone 4 - 9 ( -30 F ). An excellent urban shade and street tree.

* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD















* photos taken on May 15 2013 in Columbia, MD

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Aeryn'
Considered to be more vigorous.

Angyo Weeping'

* photos taken on June 30 2013 @ U.S. National Arboretum, DC


'Nokori'
Very large leaves are red in spring turning to glossy deep green during summer.

'Raising Blaze'
Foliage is red at first then turns back to red or intense orange-red during autumn.
It bears less fruit and is more heat tolerant.

'Streetwise'
Is more vigorous and more likely to be single trunk which has attractive colorful exfoliating bark. Its leaves are reddish purple in the spring before turning dark green.


* photo of unknown cultivar taken on April 11 2010 @ U.S. National Arboretum



Acer caesium ( Girald Maple )
An endangered medium size tree native to the western Himalayas. The largest on record is 82 x 50 feet with a trunk diameter of 4.2 feet.
The leaves are 5-lobed and up to 10 x 10 inches in size. They are borne on a <6 inch red leafstalk and are deep green above, white beneath. The foliage turns to gold during autumn. This Maple is similar in appearance to Acer villosum.
An excellent street tree that is hardy north to zone 5.

Acer campbellii ( Campbell Maple )

A rare, moderate growing, large tree native to mountain forests of China and the eastern Himalayas. It is related to Acer palmatum ( Japanese Maple ) but is larger in all its parts. Generally it tops out around 60 feet though some are known to reach as much as 100 x 60 feet with trunk diameters up to 5 feet.
Some records include: fastest growth rate - 4 feet; 36 years - 52 feet.
The 5 to 7 lobed leaves are shaped like that of Acer palmatum but are much larger reaching up to 10 inches across. They are bronze red in spring turning to dark green in summer then to brilliant red in fall.
Hardy zones 6 to 10, it is drought tolerant but should be protected from hot sun..

subsp. 'flabellatum'
Slow growing ( to 20 x 12 feet in 20 years ) and smaller ( record size only 57 feet with a trunk diameter of 20 inches ) with a twiggy habit.
The 5 lobed, glossy deep green leaves only reach up to 6.5 x 6.5 inches in size, often turning purple during autumn.

subsp 'schneiderianum'
Similar to Acer campbellii but with thinner leaves having 3 or occasionally 5 lobes.
Native from the Himalayas to western China where it forms a moderate growing, elegant tree up to 27 feet. Some records include: 11 years - 20 feet with a trunk diameter of 8 inches.
The foliage is glossy bronze green at first turning to light green in summer. In autumn the leaves turn an intense clear orange.
The attractive keys, up to 2.2 inches across are pink to red.
Hardy zones 6 to 9 thriving only in cool maritime areas such as the Pacific Northwest and the British Isles.
It is easily grown from seed if the samaras are collected before turning brown.


Acer campestre ( Field Maple )

Also called Hedge Maple; this medium to large size tree is native to Europe, western Asia and north Africa. It typically forms a spreading dome shape tree to 60 feet though the largest on record is much larger at 115 x 90 feet with a trunk diameter of 7 feet. Usually moderate growing; it can become fast growing reaching up to 13 x 10 feet in 5 years & 40 x 40 feet in 20 years. The record growth rate is 5 feet.
The Field Maple can also be kept sheared and is commonly used for hedges in England.
In the U.S. large trees grow at: Tacoma, WA - 83 x 64 feet; Lansing, MI - 64 feet.
The Field Maple can live up to 600 years in age.
The palmately 5-lobed leaves are up to 5 x 5 inches and are dark green above and paler downy beneath. They appear early in spring and turn clear golden yellow to orange late in autumn. The leafstalks are up to 4 inches in length and exude a milky sap when cut.
In early spring the foliage is bright yellow green at the same time as the small yellow flowers that are borne in upright clusters.
Seed crop can be heavy and resulting seedlings abundant.
The pale brown bark on older trees is thick and corky furrowed.
The twigs frequently have corky ridges.
The Field Maple grows in almost any soil wet or dry and is heat tolerant as well as very lime tolerant. It grows well in sun or part shade and is hardy zones 3 to 8.
This is the best Maple for growing on dry alkaline soil.
In Washington, D.C. this tree can be found around the Library of Congress and the U.S. Capital.

* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD








* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario




'Evelyn'
more vigorous and upright growing at a rate of up to 4 feet per year when young. It can reach 50 feet in 20 years with a very dense canopy.

'Fastigiata'
Columnar in habit, reaching a maximum size of 60 feet in height and 2.5 feet in trunk diameter.

'Purpurea'
foliage is reddish in spring turning to purple in summer then to red in autumn.

'Queen Elizabeth'
More vigorous with larger leaves.
It sets abundant fruit.

'Royal Ruby'
Foliage is reddish-purple at first, later turning to green; otherwise similar to species.

Acer capillipes ( Kigasawa Maple )

A fast growing medium size tree native to Japan. It can reach up to 40 x 20 feet in 20 years and eventually top out around 50 feet. The largest on record is 82 x 50 feet with a trunk diameter of 3 feet. The fastest growth rate on record is 4 feet.
The attractive foliage triangular with 3 short lobes. The leaves are dark green above and paler smooth beneath with serrated edges. The leaves are borne on prominent red stalks and turn to crimson in mid November; they also emerge reddish in spring.
The flowers small, green and borne in racemes up to 4 inches in length.
The young stems are bright pinkish-red. The bark on older trees is green-brown with white vertical stripes.
Hardy zones 4 to 9 and easily grown from seed or cuttings on fertile well drained soil. This Maple is very heat tolerant when grown in shade.

* photos taken on May 6 2010 @ Brookside Gardens, Wheaton, MD








Acer cappadocicum ( Coliseum Maple )

A large fast growing tree native to mountainous areas of Turkey & southwest Asia to the Himalayas. It is known to reach as much as 82 x 54 feet in 20 years. The largest ever recorded is 100 x 70 feet with a trunk diameter of 52 inches.
The fastest growth rate on record is 6 feet!
The leaves have a flat base and 5 or 7 untoothed very triangular lobes. They are up to 7 x 8 inches in size and are reddish in spring turning to green in summer then to yellow ( rarely red ) in autumn. The leaves are smooth on both sides.
Leaf stalks which are up to 3.5 inches long exude milky juice when cut.
The small yellow flowers are borne in upright clusters in late spring along with the foliage which is still verdant bright yellow-green at that time. The keys are up to an inch in size with spreading wings.
The bark is light gray and smooth.
Very rare in North America; this Maple should be much more widely planted. It is very adaptable and thriving trees have reached 91 feet in height in Tacoma, WA and 65 feet in Washington, D.C. ( where it grows at sw. Capital Park as well as Lafayette & Garfield Park ). The Coliseum Maple loves hot summers and is hardy from zone 4 to 8. Root suckers can sometimes be a nuisence.

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Aureum'
gold new foliage in spring turns to green in late summer.
This cultivar burns badly in the Midwest unlike the Green form.

'Rubrum'
deep red young foliage in spring.

subsp. 'sinica'
smaller growing ( record is 73 x 70 feet ) and native to mountain forests of western China and the Himalayas. The bark is rougher and the leaves have more sharply pointed lobes. Red fruit in the fall.

* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.


'Tricolor'
blood red new leaves speckled with rose-pink

Acer carpinifolium ( Hornbeam Maple )
Native to mountain forests of Japan; this vigorous growing tree can grow up to 2.5 feet per year and reach up to 18 x 10 feet in 10 years. Eventually reaching around 50 feet in size; the largest ever recorded is 70 x 45 feet with a trunk diameter of 1.6 feet.
The unlobed leaves have saw-tooth edges and are up to 8 x 3.3 inches in size ( usually 5 x 2 inches ). The conspicuously veined leaves appear early in the spring and turn to gold in autumn often holding on into early winter. The heavily corrugated foliage resembled Carpinus ( Hornbeams ) and is lush dark green above in summer ( paler & downy below ).
The small yellow-green flowers are borne in hanging clusters in late spring along with the foliage which is verdant fresh bright green at the time. Male and female flowers are borne on separate trees so both trees need to be present within proximity to produce seed.
The branching habit is dense and the bark is smooth and light gray with conspicuous lenticels ( similar appearing Carpinus caroliniana does not have lenticels ).
Hardy zones 3 to 8 preferring deep, fertile soils. Easy to propagated from rooting cuttings taken in August.
Not common in the U.S. I did see a street planting of thriving "unusual Hornbeams" in central Maryland last summer that upon closer inspection discovering the keys realized it was actually the Hornbeam Maple.



* photo taken on April 11 2010 @ U.S. National Arboretum


* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.



* photos taken on June 23 2013 @ U.S. National Arboretum, DC
* photos taken on June 30 2013 in Columbia, MD


Acer caudatifolium ( Kawakamii Maple )
A fast growing tree native to the mountain forests of Taiwan. It is similar to Acer davidii but grows larger to 60 feet with the largest on record being 120 x 50 feet with a trunk diameter of 4 feet.
The leaves are heart-shape, up to 6 x 6 inches in size. They are somewhat papery in texture and are dull green in summer turning to fiery red in autumn.
The winged seeds are red. This rare tree is hardy from zones 6 to 10 but hates hot summers.

Acer caudatum
A slender large tree native to the eastern Himalayas, northern Burma, Manchuria and northern Japan. It is rapid growing ( record growth rate being 4.5 feet ) and the largest tree ever recorded is 66 x 3o feet with a trunk diameter of 5 feet.
The deciduous leaves have 5 triangular lobes with coarsely serrated margins. The leaves are similar in appearance to Acer spicatum of North America but are dense bristly beneath rather than smooth. They turn yellow in fall.
The winged fruits are up to 1.5 inches long in clusters up to 4 inches long.
The stems are very attractive and light green.
The dark brown bark is heavily fissured. Hardy north to zone 4
and very drought and wet soil tolerant.



subsp. ukurunduense
A subspecies native to Manchuria, Korea and Japan that is hardier north to zone 2 tolerating as cold as -50 F! Its 5 or 7 lobed leaves are up to 7.6 x 6 inches in size ( usually around 4 inches ) and are born on stalks up to 4 inches in length. The lobes are serrate edges and the very interesting foliage is yellow downy below.
Smaller in size; this variety only reaches up to 30 x 20 feet with a trunk diameter of 1 foot.

Acer cissifolium ( Vineleaf Maple )
A spreading moderate growing very dense canopied medium size tree, reaching around 50 feet, that is native to mountain woods of Japan. It can reach 11 feet in height in 4 years and eventually grow to 50 feet.
Some records include: fastest growth rate - 2 feet; 33 years - 32 x 36 feet with a trunk diameter of 1.9 feet; largest on record - 80 x 53 feet with a trunk diameter of 3 feet. A very large tree also grows at Morris Arboretum in Philly ( approx. 42 x 53 x 3 feet ).
This Maple makes an excellent small street tree.
The leaves are made out of 3 individual ovate leaflets which are bronze in spring turning to dark green and smooth in summer. They have coarsely serrated margins and turn intense red in autumn.
The pendulous flower clusters up to 4.7 inches produce abundant seed clusters.
The male and female flowers occur on separate trees.
Fertile seeds are rare since male trees are extremely rare and are needed to pollinate the female trees.
The bark is smooth and gray when young and later becoming yellow-gray with raised lenticels.
Drought tolerant and grows well on fertile, well drained acid soil. Hardy zones 4 to 8 and tolerates as cold as -30 F. A very rare tree well deserving of more use in the landscape.

* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.


Acer x conspicuum
The hybrid between Acer davidii & A. pennsylvanicum. It is a vigorous growing medium size tree sometimes growing at a rate up to 3 feet per year. The largest recorded so far is 60 x 50 feet with a trunk diameter of 4 feet.
The leaves have 3 or 5 lobes with the lower 2 usually being small. They turn to yellow in the fall and are usually around 5 inches long and wide, though in rare cases double that.
Hardy zones 4 to 9.

'Elephants Ear'
Huge leaves to 12 inches in length with no lobes. Bark is striped. Grows vigorously up to 3 feet per year.

'Silver Vein'
Very large foliage. The bark is the most conspicuously striped of all the Snakebark Maples. Averages about 14 x 6 feet in 10 years.

'Silver Cardinal'
Very showy foliage that is green heavily mottled white with pink veins. The leaves are borne on scarlet leafstalks. The bark is maroon striped silver.

Acer x coriaceum
A hybrid between Acer opalus & A. monspessulanum. It forms a neat dome shaped tree with the largest recorded so far being 60 x 60 feet with a trunk diameter of 3 feet.
Very vigorous growing; it holds its broadly ovate, leathery, 3 lobed leaves very late into the fall usually well into December. The leaves are up to 4 inches across.
Hardy zones 5 to 8.

Acer coriacifolium ( Cinnamon Leaf Maple )
A very rare fast growing tree native to China with a maximum size of 33 feet.
Its unlobed foliage is oblong and very leathery, up to 5 inches in length.
The bark is light brown. Hardy north to zone 8.

Acer crataegifolium ( Hawthorn Leaf Maple )
A rapid growing small tree native to Japan; the largest on record is 33 x 33 feet with a trunk diameter of 1 foot, though I suspect on ideal sites with great age 50 x 33 feet is possible. This extremely rare tree has hardly been tested in the U.S. The fastest growth rate on record is 4 feet.
The ovate leaves are bright yellow-green in spring turning to deep blue-green above and paler beneath in summer. They are up to 3 x 3 inches. are blue-green.
The yellow-green flowers are small and in racemes
Bark is green with vertical stripes.
Hardy zone 5 to 8. Good on almost any fertile soil in sun or part shade.

subsp. 'Macrophyllum'
Large leaves up to 7 inches long and 3 inches wide.

'Veitchii'
Striking white and pink variegation on deep green background. Foliage turns pink & red-purple in autumn.
One clone of Acer crataegifolium has black-purple fall color that is reported to be the DARKEST OF ALL MAPLES

Acer davidii ( Snakebark Maple )

A fast growing, medium-sized tree, reaching around 50 feet, that is native to Sichuan Province, China.
Some records include: fastest growth rate - 5 feet; 5 years - 13 feet tall and 4 inches in diameter; 10 years - 20 x 16 feet; 15 years - 27 feet; 20 years - 40 x 20 feet; largest on record -
record size is 70 x 50 feet and 4 feet in trunk diameter.
A very large tree grows at Taylor Arboretum in Wallingford, PA near Philly.
The cordate unlobed, toothed, glossy, dark green leaves reach 8 x 5 inches and usually turn crimson late in the fall. The leaves are born on red leafstalks.
In early spring the leaves are verdant bright green and about the same color as the flowers which are borne in drooping racemes.
The very attractive bark is smooth and green with vertical white stripes.
Hardy zones 4 to 8. The Snakebark Maple is very easy to grow from seed and is very tolerant of hot humid summers and flooding.

* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.




subsp. grosseri
similar but smaller to 40 x 20 feet in 20 years ( record size is 60 x 50 feet with a trunk diameter of 26 inches ) with smaller leaves ( to 6 x 5 inches ) that have brown hairs below and a double serrate edge. They turn scarlet in fall. Slightly slower growing - the record growth rate is 4 feet. Clay tolerant.
Acer davidii cultivars include:
'Earnest Wilson'
More compact with narrower leaves that turn to orange in autumn.

'George Forrest'
is more open with spreading branches. Its large, unlobed leaves, to 8 inches, are dark red in the spring and turning dark green in the summer. Its fall color is not outstanding.



* photo taken on April 11 2010 @ U.S. National Arboretum


Acer diabolicum ( Horned Maple )
A moderate growing medium sized tree native to the mountain forests of Japan. It can reach up to 33 feet in height in 20 years and an eventual size of 50 feet. Very rare in the U.S.; there is one 50 x 40 feet growing in New Jersey. The largest Horned Maple ever recorded is 66 x 60 feet with a trunk diameter of 25 inches. The fastest known growth rate is 4 feet.
The coarsely toothed leaves are large ( up to 8 x 8 inches ) and are 5-lobed. They turn to orange late in the fall and are borne on leafstalks up to 3.7 inches long.
The yellow flowers are borne in long pendulous inflorescences and are followed by red-brown bristly winged fruits.
The bark is dark gray and smooth becoming pebbled as the tree ages.
Very heat tolerant as well as flood tolerant; it is hardy from zones 3a - 8. The Horned Maple has alot of potential as a landscape tree in the Midwest and Eastern parts of the U.S. and Canada.
'Purpurea'
purple foliage constasts well with abundant pink flower inflorescences

Acer distylum ( Linden Leaf Maple )
A rare medium size tree native to Japan. It is moderate growing up to 20 feet in 10 years; 27 feet in 20 years; it rarely grows much larger at maturity. The largest recorded is 50 feet in height with a trunk diameter of 1 foot.
The leaves on this Maple resemble that of the Lindens ( Tilia ). They are up to 7 x 5 inches in size and are pinkish in early spring turning to lush dark green then to yellow or sometimes red in fall.
unusual for a Maple; the seeds are held in upright clusters up to 4 inches in length.
The seeds are difficult to germinate. Hardy zones 5 to 8.

Acer x duretti
A hybrid between the Acer opalus & A. pseudoplatanus reaching up to 40 x 50 feet in size. Its leaves are intermediate in appearance, are light green and up to 5 x 5 inches in size. Hardy north to zone 6.

Acer elegantulum ( Elegant Maple )
A very rare moderate growing medium sized tree native to China. It can reach 15 feet in height in 10 years and eventually grow to 30 feet. The largest on record is 50 x 35 feet. The 5 lobed leaves are papery thin and up to 4 inches in length. They are reddish-purple at first in spring. Hardy north to zone 6a and grows well in sun or part shade.

Acer erianthus
A small tree similar in appearance to Acer palmatum with the largest recorded being only 33 feet in height and 1 foot in trunk diameter. It is moderate growing with the most recorded for a year being 40 inches. The dark green leaves to 6 x 5.5 inches in size are borne on stalks to 3 inches in length. Hardy north to zone 6. Do not plant in full sun.

* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.



Acer fabri
An attractive medium size tree widely native from southern China to the eastern Himalayas. It is moderate growing and the largest on record is 66 x 30 feet with a trunk diameter of 2 feet. One tree is reported to have grown to 7 feet in 4 years in North Carolina.
The unlobed foliage is glossy dark green with smooth margins. The leaves up to 6 x 2 inches in size are usually evergreen but will become deciduous during severe winters in the cooler parts of its range.
The small fruits are bright red before they mature.
Hardy zones 7 to 11; it prefers humid climates.

Acer ginnala ( Amur Maple )
A fast growing dense canopy tree native to northern Asia that is spreading in habit.
Typically reaching around 25 feet; the largest on record is 57 x 67 feet with a trunk diameter of 4 feet in Media, PA
It is known to reach 20 feet in 5 years & 37 x 33 feet in 20 years and the fastest growth rate on record is 5 feet. The Amur Maple is a long lived tree.
The smooth, glossy, ovate, toothed 3 lobed foliage appears verdant bright green early in spring. They turn to glossy dark green in summer then to intense scarlet in early autumn.
The yellow flowers are fragrant and occur in upright clusters.
The fruits are up to 1 inch with red wings and are borne in hanging clusters.
The bark is gray-brown and smooth.
Liking hot summers but hating drought; the Amur Maple is hardy from zones 2 to 8 ( tolerating -50 F ). It is tolerant of pollution and shade and is happy in any fertile soil.

* photo taken in Columbia, MD


* photo from unknown internet sourcce


* photo taken on April 11 2010 @ U.S. National Arboretum



* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD


* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario






* photo taken on May 8 2011 in Bel Air, MD


* photo taken on Sep 20 2012 in Ellicott City, MD

* photos taken on Oct 17 2013 in Olney, MD


'Burgundy'
rich red autumn color

Acer griseum ( Paperbark Maple )

A moderate growing ( slow with age ) tree, reaching around 50 feet, that is native to
mountain woods in central and western China where it is endangered. Some records include: fastest growth rate - 3.5 feet; 10 years - 20 x 20 feet; 20 years - 27 feet with a trunk diameter of 5 inches; largest on record - 75 x 50 feet with a trunk diameter of 32 inches.
A large tree grows at Rutgers Gardens in New Jersey.
Its leaves are composed of 3 elliptical leaflets, up to 6 x 2 inches, that are deep green above, bluish white densely hairy beneath. The foliage appears early during spring and also turns glowing scarlet-red late in autumn.
The winged fruits have unusually large seeds though the Paperbark Maple is usually infertile in cultivation.
The bark is the biggest ornamental feature of all. Its glowing orange-red color and papery texture makes it stand out in the landscape every month of the year.
It is heat and clay tolerant and also not prone to disease. Hardy from zones 4 to 8 and tolerating as low as -30 F. To reproduce the Paperbark Maple collect ALL the seeds and do the float test - the good seeds sink. Then you want to soak the seeds in 180 F water followed by a 24 hour cooling soak.

* photos taken Feb 2009 @ U.S. National Arboretum





* photo taken @ Brookside Gardens, Wheaton, Maryland on April 2002


* photo taken on May 1 2010 @ U.S. National Arboretum, D.C.



* photos taken on May 6 2010 @ Brookside Gardens, Wheaton, MD





* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD





* photo taken on June 19 2010 in Columbia, MD



* photo taken on July 17 2010 @ Morris Arboretum, Philly, PA



* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario


* photo taken on August 4 2010 @ Stratford, Ontario

* photos taken on Mar 7 2013 @ Brookside Gardens, Wheaton, MD

Acer x 'Gingerbread' ( Hybrid Paperbark Maple )
The hybrid of Acer griseum x A. nikoensis. It is heat tolerant and fast growing ( up to 3 feet per year ) with cinnamon color bark.
The blue-green foliage turns glowing red during autumn.
Hardy zones 5 to 8. 'Cinnamon Flakes' is similar with very late fall color.



* photo taken on June 23 2013 @ U.S. National Arboretum, DC


Acer heldreichii ( Greek Maple )
A very attractive tree native to the Balkan Region of Europe and Greece. Moderate growing to 80 feet. The largest on record is 100 x 60 feet with a trunk diameter of 3 feet. Average size in 20 years is 27 feet.
The 3-lobed leaves somewhat resemble Virginia Creeper. The sculptural foliage is up to 7 x 10 inches in size, is dark lush green above and has brown hairs on the veins beneath. The leaves turn yellow to red in autumn.
The bark is dark red-brown and smooth. The stem buds are black.
Hardy zones 5 to 8. Do not grow from seed source present where weed tree Acer pseudoplatanoides is present since they hybridize readily.


Acer henryi ( Henry Maple )


A spreading dome shape tree that is a rare native of mountain forests in central China. The largest on record is 60 x 60 feet with a trunk diameter up to 3.4 feet. Typically a moderate grower around 2 feet per year; the record growth rate is 4 feet. One of the largest trees known grows in Philly, PA
Its leaves are made of 3 elliptic taper-pointed leaflets up to 5 x 2 inches in size. They are red-bronze in spring turning dark bluish green in summer then scarlet in fall. The Henry Maple leafs out early in spring and the leaves are usually hairy beneath.
The yellow flowers appear in spring in slender racemes up to 8 inches long with the unfolding leaves. The winged fruits up to an inch in size are borne in drooping clusters.
The new shoots are slightly furry
The bark is beige and smooth eventually with conspicuous raised lenticels.
Hardy from zones 4 to 8 tolerating -30 F





* photo taken on May 1 2010 @ U.S. National Arboretum, D.C.



* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.






* photos taken on 4th of July 2010 @ U.S. National Arboretum, D.C.




* photos taken on October 17 2010 @ U.S. National Arboretum, D.C.




* photos taken on June 23 2013 @ U.S. National Arboretum, DC


Acer hyrcanum ( Balkan Maple )
Native to southeast Europe and the Black Sea region; it is a moderate growing, medium size tree with the largest recorded being 100 x 40 feet with a trunk diameter of 3 feet. Balkan Maple is long lived, exceeding 130 years in age.
The leaves are up to 6 inches across and are very shiny dark green above and bluish white below. They turn to yellow or scarlet during autumn.
The light gray bark is very rough and plated. Hardy north to zone 4.

Acer itoanum
To 45 feet in height. Full description coming soon.

Acer japonicum ( Fullmoon Maple )
A broadly spreading dense canopied small to medium size tree native to mountains of Japan. It grows at a moderate rate to a maximum size of 46 x 27 feet in 20 years. It rarely exceeds 50 feet at maturity though the largest trees ever recorded reach up to 72 x 72 feet with a trunk diameter of 26 inches. The fastest recorded growth rate is 3 feet.
The round leaves are cut into 7 to 11 sharply toothed ovate pointed lobes. They leaves average 6 inches in width but can be as much as 9 x 10 inches on vigorous shoots. The Fullmoon Maple leafs out early in spring when the foliage is hairy; turning to dark green above and lighter below being nearly smooth on both sides.
The leaves turn yellow, orange and red in fall.
The small red-purple flowers are borne in drooping clusters and are replaced later on by green keys up to an inch wide.
The stems are very thick and the bark is brown and smooth.
Grows best in a moist, well drained, fertile site sheltered from excessive wind. Hardy zones 4 to 8, tolerating as low as -31 F. Sun or part shade is generally good though part shade it better where summers are extremely hot.
'Aconitifolium' ( Fernleaf Maple )
less vigorous with deeply dissected toothed leaves that emerge coppery-red turning to green then to deep red in late autumn.

* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.




* photos taken on 4th of July 2010 @ U.S. National Arboretum, D.C.


'Attaryi'
Huge, deeply-cut leaves ( around 10 inches across ) on a tree reaching up to 30 feet; otherwise similar to species.

'Vitifolium' ( Vineleaf Maple )
Very vigorous. Very large leaves are 11 lobed, bronze in spring turning to dark green in summer then to dazzling red in fall. The leaves can reach up to 8.7 x 9.5 inches in size.



'Wood's #2'
Reaches about the same size with huge leaves, almost up to a foot across, turn intense yellow, orange and red in fall.

Acer laevigatum
A large tree native to the mountains of Nepal, southeast China and Hong Kong.
The largest on record is 80 x 60 feet with a trunk diameter of 4 feet.
This Maple is similar in appearance to Acer fabri.
The leathery, lance shape leaves are usually evergreen and are up to 6 x 3 inches in size. The shiny bright green leaves can become deciduous and drop at 23 F
The olive green branches are smooth.
The purplish winged keys grow to 3 inches across.
Hardy zones 7 to 9 and possibly 6.

Acer laurinum ( Laurel Maple )
A tall evergreen tree native to the mountains of Indonesia, Malaysia, Burma, Hainan Province of China and the Phillipines.
It can reach up to 60 feet or more with the tallest on record being 100 feet. Moderate in growth rate, it can reach up to 22 feet in 10 years.
Its foliage is neither toothed or lobed and is laurel-like and elliptic up to 6 x 3 inches.
Hardy zones 8 to 9. No known data exists on it being tested in the southeast U.S. where it may be adapted. Extremely rare.

Acer lobelii ( Lobel's Maple )
A very fast growing columnar tree native to mountain woods of southern Italy. It is closely related to Acer cappadocicum. In 20 years it can reach up to 36.5 x 17 feet in size. The fastest growth rate on record is 5 feet and the largest tree on record is 100 x 33 feet with a trunk diameter of 4 feet.
Very erect habit with upswept branches; this Maple is excellent for planting on narrow avenues. It is a great replacement for the Lombardy Poplar.
The palmately lobed leaves have 5 untoothed, wavy edged, lobes that end in a tapered point. They are up to 7 x 7 inches in size and are glossy dark green and smooth above in summer turning to yellow and sometimes orange in autumn. The shoots are bloomy blue-white. In the spring the leaves are verdant bright green at the time of the yellow-green flowers in upright clusters. The flowers later turn into winged fruit up to an inch in size.
The bark is light gray and smooth with shallow vertical fissures.
The Lobels Maple prefers hot summers and is hardy zones 5 to 9.
Easily grown from seed in autumn on any fertile well drained soil.

Acer longipes
A large tree native to China that can reach up to 82 feet in height with a trunk diameter up to 4 feet. It can grow fast with as much as 4 feet per year being recorded.
The 5-lobed leaves are glossy green and variable in size to 6.5 inches in width.
The foliage resembles Acer cappadocicum in appearance.
The yellow flowers occur in long clusters up to 8 inches in length.
Few seeds are typically set therefore this tree is rare.
The bark is smooth and gray
Hardy zones 5 to 8. Clones from western China should be tested in zone 4.

Subsp. 'Amplum' as described above.

Subsp. 'Catalpiifolium' ( Catalpa Maple ) is a clone "on steroids" reaching up to 100 feet in height with large foliage up to 11 x 10 inches in size.

Acer mandschuricum ( Manchurian Maple )
A very rare tree similar in appearance to Acer nikoensis that is native to mountains of eastern Russia, Manchuria & Korea.
The leaves are actually composed of 3 individual oblong narrow leaflets up to 4.5 inches long
that appear early in spring. The leafstalk is up to 4 inches long. The foliage turns intense scarlet-red during autumn.
Fast growing and large up to 50 feet ( record being 100 feet ).
The bark is smooth and gray.
Hardy zones 3 to 7 and disease free. This beautiful tree should be planted much more in cooler parts of North America.

* photo taken on May 1 2010 @ U.S. National Arboretum, D.C.



* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD





Acer miatensis
Very endangered and native to central China; this attractive Maple looks like the North American Acer nigrum and should be used as an ornamental shade tree in North America. Its leaves are up to 5 inches in length and its bark is dark gray and flaking into long flakes. Hardy north to zone 5; tolerating at least -15 F with no damage.

Acer micranthum ( Komine Maple )
A very rare, moderate growing, small tree native to Japan with the largest recorded only being 36 x 25 feet with a trunk diameter of 3 ( rarely over 1 ) feet. Additional records include: 10 years - 10 x 6 feet; longest lived - 600 years.
The serrate edge, deeply divided, 5-lobed leaves are up to 3.5 inches in length. The foliage is deep purple during early spring turning to green in summer. The leaves turn intense orange and scarlet-red during autumn.
The flowers are tiny and viable seed is rare.
Hardy zones 6 to 8 on just abut any well drained soil though fall color does tend to be better on neutral to acidic soils.

'Candelabrum'
Stronger growing with larger leaves

Acer miyabei ( Miyabe Maple )
Native to Japan; this Maple resembles the Norway Maple in appearance and is broadly columnar eventually becoming rounded and dense.
Fast growing; it can reach up to 30 feet in 10 years and the record growth rate is 4 feet. Eventually a medium size to large tree; the largest on record is 90 x 82 feet with a trunk diameter of 3.5 feet. One tree almost 70 x 50 feet grows in Lisle, Illinois.
The very attractive palmate 5-lobed leaves have blunt toothed margins and appear early in spring. They average around 6 x 6 inches in size with leafstalks up to 7 inches though the largest leaves on vigorous shoots reach up to 8 x 11 inches. They are bright green and glossy above, paler below and turn to red ( sometimes yellow ) during autumn.
The yellow flowers are borne in slender stalks soon after the tree leaves out.
The corky bark is gray-brown with orange brown fissures; peeling in thin scales on older trees.
A top rate shade tree with strong sturdy branches. Very heat tolerant as well as tolerating drought, pollution, clay and salt. This rare Maple is rarely bothered by pests.
Hardy zones 3 to 8 and tolerates as low as -43 F.


* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD



* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA





* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario
















'Morton'
Also called 'State Street'. Looks somewhat like Acer campestre on steroids.
It is fast growing, with deep green foliage and showy corky bark.

Acer mono ( Painted Maple )
Also known as Acer pictum; this Maple is a spreading dome shaped tree native to eastern Siberia, Mongolia, Manchuria, China, Korea and Japan. It can be fast growing with growth rates as much as 5 feet being recorded however 33 feet in height in 20 years is considered normal. The largest Painted Maple on record is 82 x 67 feet with a trunk diameter of 6.6 feet. A very large tree grows at Morris Arboretum in Philly.
This beautiful tree look in appearance like an oversized Japanese Maple. Long-lived, it can live as long as 500 years.
The light green foliage appears early in spring and is 5 to 7 lobed. They leaves turn scarlet late in the fall and are up to 8 x 7 inches in size on leafstalks up to 4.5 inches. The sap on broken leaves and twigs is milky white.
The spring flowers are greenish-yellow.
The beautiful bark is smooth and yellow-gray.
Hardy zones 4 to 7; this Maple is lime and heavy clay tolerant and can become invasive in the eastern U.S. It is disease resistant and easy to grow. Clones from Manchuria should be tested in zone 3 and have potential for becoming a useful tree on the Great Plains.

* photos taken on April 11 2010 @ U.S. National Arboretum






* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.


Acer monspessulanum ( Montpelior Maple )
A rounded, medium-size tree native to the Mediterranean Sea region. It is similar in appearance to Acer campestre and is a moderate grower on good sites where it can reach over 40 feet. The largest on record is 65 x 60 feet with a trunk diameter of 4.5 feet. The world record is at Paris, France however another tree of 60 feet grows at Tacoma, Washington. The Montpelior Maple averages 24 feet in 20 years however the record growth rate is much faster at 3 feet per year. It makes a great street and urban tree for limited spaces.
The semi-evergreen leaves are 3-lobed, leathery, smooth, dark glossy green above and glaucous below. The leaves are up to 3.3 inches in width. The new foliage appears late in the spring and turns reddish in the fall. Unlike similar looking Acer campestre; the Montpelior Maple does not produce milky sap when its twigs and leaves are broken.
The winged fruits are up to an inch in size and are produced in long pendulous clusters. The bark is dark gray and smooth.
Hardy zones 5 to 8 and drought tolerant. Makes an excellent lawn tree.

* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD








subsp. 'Turcomanicum'
A subspecies native from Iran to southern Turkmenistan, which forms a very ornamental small tree.
The 3-lobed leaves, up to 1.6 x 2 inches in size, are grayish-green.
The showy fruits are yellow-winged.
Hardy zones 5 to 8, it is exceptionally heat, drought and cold tolerant. It may have great potential as a landscape tree in the Rocky Mountains and central U.S.

Acer morifolium ( Mulberry Leaf Maple )
A very vigorous, spreading, often spreading tree reaching up to 50 feet in height; this Maple is similar in appearance to Acer capillipes. The broad unlobed to 3 lobed foliage is shiny bronze or pinkish-green in spring turning to deep green in summer. The very attractive autumn color is orange and red. The botanical name describes the leaves which somwhat resemble that of the Mulberry.
Hardy zones 6b to 9. Direct winter sun can sometimes split the bark on young trees.

Acer nikoensis ( Nikko Maple )
A beautiful briadly spreading tree native to China and Japan where it is now rare. It is a moderate grower reaching up to 36 x 17 feet in 20 years. The largest on record is 82 x 60 feet with a trunk diameter of 4.3 feet. The maximum growth rate on the Nikko Maple is 2 feet per year. Long lived; the Nikko Maple can survive for up to 400 years in age.
Its leaves are actually made of 3 leaflets with the center one reaching up to 8 x 3 inches. They are dark green and smooth above, blue-white and furry below and turn brilliant scarlet in autumn. The leaves remain on the trees late in the fall lasting well into November. The foliage is bronze in early spring.
The small yellow flowers in spring are borne in clusters of 3.
The bark is gray-brown and smooth.
Hardy zones 4 to 8 tolerating as cold as -30 F

Acer nipponicum
A rare tree native to Japan ( especially Honshu & Kyushu ). It is attractive and vigorous forming a dome shaped canopy with the tallest on record being 66 feet in height ( 50 feet recorded in Netherlands ) with a trunk diameter of 16 inches. It can be expected to reach around 24 feet in 20 years.
The foliage is similar in appearance to Acer pennsylvanicum; have 5 shallow lobes and are up to 10 x 10 inches in size. The tropical looking foliage is dark green above and has fine rusty hairs beneath.
The flowers grow in long drooping inflorescences.
The bark is dark brown and smooth to lightly fissured. In winter the branching habit looks like that of Liquidambar.
Grows well in sun or part shade from zones 6 to 8.

* photo taken on April 11 2010 @ U.S. National Arboretum



* photo taken on May 8 2010 @ U.S. National Arboretum, D.C.


Acer niveum
Native to Sumatra & Java; this tropical Maple becomes a large tree to 150 feet in height. Its evergreen foliage is oblong to 8 x 3.5 inches on leaflstalks up to 3 inches in length. Hardy in zone 10

Acer oblongum
Native to western China and the Himalayas. This long lived, compact Maple forms an attractive medium size shade tree. The largest on record is 80 x 40 feet with a trunk diameter of 2.5 feet. It is also fast growing with the record single year growth increase being 5 feet. Some records include: 5 years - 21 feet; 9 years - 30 feet.
A tree of 40 x 40 feet is recorded growing in Los Angeles.
The semi-evergreen, unlobed, oblong, leathery foliage is pink-bronze in spring turning to dark shiny green above and light bluish and waxy beneath.
The leaves reach up to 7 x 3 inches and are borne on stalks up to 3.5 inches in length.
It is widely planted in southern China and has been planted on occasion in the U.S. ( recorded in California & North Carolina ) and has potential over much of the Deep South. Its seeds sprout readily and it is hardy from zones 7 to 11

Acer oliverianum ( Oliver Maple )
A rare tree native to Yunnan & Hubei Provinces in China. It is strong and fast growing and grows to be a medium size shade tree. The largest on record is 80 x 25 feet with a trunk diameter of 3.5 feet.
The thick textured leaves are shaped like the Sweet Gum and are up to 5 x 5.5 inches in size. They appear late in spring and are bronze turning to dark green then to orange-red over a long period in the fall.
Young shoots are purplish-green.
The winged fruits are up to 1 inch long and the keys are widely angled.
Hardy zones 5 to 8; this Maple requires hot summers to thrive.

* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA










subsp 'wuyuanense ( Wuyuan Maple )
Also known as Acer wuyanensis or as Chocolate Maple. It is similar to Acer olivianum but is slow growing and small, only reaching up to 17 x 10 feet in 15 years and eventually 23 feet or slightly more.
Native to the mountains of Jiangxi and Anhui in China and differs from A. olivianum by having sharply toothed, 5 lobed leaves that emerge with the appearance of glossy dark brown chicken feet. The foliage later turns dull deep green.
An additional added feature on this tree are the near black or greenish-purple young stems.
Likely hardy zones 6 to 8 in the Pacific Northwest and zone 6 in the east.

Acer opalus ( Italian Maple )
Native to southern Italy, Spain, France, Hungary, Switzerland & Morocco; the Italian Maple forms a large dome shaped tree. It can reach up to 60 x 20 feet in 20 years and eventually grow to around 80 feet. The largest on record is 105 x 65 feet with a trunk diameter of 5.2 feet.
The foliage somewhat resembles Acer pseudoplatanus and is up to 7 x 7 inches in size ( 5 inches is average ) with 3 to 5 bluntly toothed lobes. They are dark green and shiny above and are paler below with fine brown hairs. The foliage often turns red in autumn.
The flowers are small and bright yellow in early spring.
The gray bark is tinged pink and peels in large square plates.
Very lime tolerant and loves hot summers. Used for reforestation in its native range.
Hardy zones 5 to 8

Acer paxii ( Evergreen Maple )
An evergreen dense canopied Maple native to southeast Asia that forms a medium size tree. The largest on record is 50 x 47 feet with a trunk diameter of 2 feet and
it is slow growing up to a foot per year.
The leathery, bright green foliage is unlobed and up to 5 inches in length.
The bark is light gray. Hardy zones 8 and south and is an excellent landscape tree for the Deep South.

Acer pectinatum ( Looseflower Maple )
Formerly called Acer laxiflorum; it is native to mountain woods of central & western China as well as the Himalayas. Its growth habit and foliage is very similar to Acer davidii. Moderate growing; it can reach 50 feet or more. The largest recorded is 80 x 30 feet with a trunk diameter of 3 feet.
The dark green foliage is similar to Acer davidii except the leaves are not shiny and reach up to 8 x 6.5 inches. They turn scarlet in autumn.
The bark is pale green streaked white.
Hardy zones 3 to 7 and does not like dry or alkaline soils.

subsp. 'forrestii'
bark of younger trees and branches is coral-red and vertically striped with white

Acer pentaphyllum
An elegant and striking, rounded small tree native to Yalung River Valley in Sichuan Province in China. It is believed to be extinct in the wild.
Moderate growing; it can reach 15 feet in 10 years. The fastest growth rate recorded is 40 inches and the largest known tree is 36 x 31 feet with a trunk diameter of 3 feet.
The up to 4 inch wide palmate leaves are deeply divided to the base into 5 narrow lobes. The foliage appears late in spring and is bronze at first turning to green above and whitish below. The foliage turns to orange in the fall and is supported on stalks that are long and reddish all season.
The lightly peeling bark is light brown.
It is rare in cultivation because it is propagated by grafting onto rootstock which is not related, such method is difficult. Seed production is sparse on cultivated trees but can also be used. Hardy zones 4 to 8 preferring a site protected from excessive wind.

Acer pilosum stenolobium
An extremely rare Maple native to China which is an upright small tree reaching up to 30 feet. It grows well in the eastern U.S. as far south as North Carolina and reaches up to 13 feet in 6 years. The dark green leaves are 5 narrow fingered and turn to yellow in autumn. Hardy from zones 5 to 8 and tolerates hot humid summers.

* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA




Acer platanoides ( Norway Maple )
A large shade tree that is broadly columnar in habit becoming rounded and spreading with age. The Norway Maple is fast growing and can reach 80 feet or more. The largest trees ever recorded reach up to 140 x 120 feet with trunk diameters up to 8 feet. Some cultivated trees have already reached large sizes in North America including: New Paltz, N.Y. - 140 x 120 feet; Wayne County, Michigan - 102 x 85 feet; Hamilton College, Clinton N.Y. - 120 x 70 x 5 feet; Allegan, Michigan - 105 x 91 x 4.5 feet. The Ontario, Canada champion is 100 feet with a trunk diameter of 5 feet in Toronto.
Some growth records include: fastest growth rate - 6 ( reports of 8 ) feet; 5 years - 20 feet; 50 years - trunk diameter of 2.2 feet.
Long lived with 250 years being the record.
The leaves are palmately 5-lobed and somewhat resemble the Platanus ( Sycamores ) in shape. They are shiny medium green turning to clear yellow to orange late in autumn and are borne on long slender stalks that bleed milky sap when cut. The milky sap distinguishes it from the similar looking Sugar Maple which has clear sap.
Long before Europeans colonized America, the Norway Maple was being tapped for its sugar in Scandinavia. Many people have this tree growing in their yard and have no idea that is it one of the better sugar producers of all Maples.
The flowers appear early in spring just before the tree leafs out. The small flowers are in showy yellow-green clusters up to 3 inches in size.
. They are later replaced by wide-angled winged fruits up to 2 inches across.
The bark is brown and smooth becoming ridged as the tree ages.
The Norway Maple can be weedy in some areas. It also casts very dense shade and has shallow roots killing turf beneath it. Some forms suffer leaf scorch in hot summer weather and also leaf blight limiting its usage in some areas. Do NOT use lawn weed killers within the root zone of the Norway Maple as they can easily kill it.
Hardy zones 2 to 8. This deep rooted tree is salt, compaction and pollution tolerant.

'Alberta Park'
Vigorous and extremely cold hardy. Resistant to frost cracking. Otherwise similar to Acer platanoides

'Columnare'
Upright in habit, eventually reaching up to 72 x 20 feet. Older trees may be prone to breakage.

'Crimson King' ( Crimson King Norway Maple )
Foliage is deep red in spring turning to shiny deep purple in summer then to orange and red in fall. Otherwise similar to Acer platanoides. Fast growing with the same rate as Acer platanoides.

* picture taken near Wilkes-Barre, PA on August 2004


* photo taken on May 1 2010 @ U.S. National Arboretum, D.C.



* photo taken on August 2 2010 in Bayfield, Ontario


* photos taken on August 4 2010 @ Stratford, Ontario



* photo taken on Aug 3 2011 in Luzerne Co, PA


'Crimson Sentry'
Columnar, dense and slow growing to 2 feet per year. It reaches an estimated maximum size of 40 x 15 feet.
The foliage is glossy and purple similar to 'Crimson King'

* photo taken on August 6 2010 in Windsor, Ontario



'Culcullatum'
Very shallowly claw tipped lobed with the leaves rounded or almost looking fan shaped. Very exotic. Vigorous growing; the largest recorded is 92 feet in height.

'Deborah'
Foliage emerges red-purple in spring turning to dark green in summer then to red in the fall. The foliage is thicker than that of regular Norway Maple and more scorch resistant.
Very fast growing; some records include: 1 year after budding - 12 feet; second year after budding - 15 feet with a trunk diameter increase of 1.7 inches.

'Dieckii'
Glossy dark green leaves turn from gold to red-brown in fall and are up to 8 inches in width. Some of the leaves are 3 short lobed and some consider this a hybrid with Acer lobelii. Hardy from zones 5 to 9 and originating in Zoschen Nursery in Germany in 1887; it can reach up to 66 feet in height.

'Drummondii'
Foliage is boldly variegated with wide gold margin that turns to white as summer progresses. It does sometimes require removal of reverted all green branches.
Dense in habit and slower growing to around 2 feet per year.

* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario




* photos taken on Aug 1 2013 @ Stratford, Ontario


'Emerald Queen'
Tall and fast growing with a good branching habit. The leathery, glossy dark green leaves turn to gold in the fall. Drought tolerant.

'Laciniatum' ( Eagle Claw Maple )
An erect tree. Deeply cut leaves with lobes twisted into claw like projections.

'Lorbergii'
Vigorous and spreading. A smaller tree only growing to 50 feet. The leaves are deeply cut into 5 sculptured long pointed lobes. Medium green in summer they turn vibrant yellow and orange in fall.

'Palmatifidum'
Very exotic looking leaves are cut almost to the base. The lush medium green leaves are deeply cut into 5 lobes which are long pointed at the tip and smooth at the margin. The fall color is brilliant yellows, oranges and reds all at once.

Schwedleri'
Foliage is red in spring turning dark green in summer then to scarlet in fall.
Very similar to 'Deborah' but more of a bronze tone in summer.

'Summershade'
Tall and rapid growing. The large leathery leaves are dark green and last later in fall than average. They are very resistant to scorching in hot dry weather.

subsp. 'Turkestanum'
From Turkestan; this regional variant has very large leaves, red twigs and is very heat tolerant making it a useful tree to the U.S. Midwest. Otherwise similar to Acer platanoides.

* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario



Acer pseudoplatanus ( Sycamore Maple )
A valuable shade tree native to central and southern Europe. The Sycamore Maple grows fast and tall reaching over 100 feet. The largest on record is a truly massive 165 x 110 feet with a trunk diameter of 11 feet. Some other records are:
7 foot height x 1.5 diameter single year growth increase; 20 feet in 5 years; 82 x 60 feet in 20 years; 3.3 foot diameter in 80 years and the U.S. champ - 110 feet tall with 4.5 foot diameter in Overbrook, PA. The average height in 20 years is 60 feet. The growth on the Sycamore Maple continues over a long period from April into August. In Washington, D.C. this tree is known to grow at the U.S. Capital & at the Museum of Natural History. This very attractive tree can live up to 800 ( rarely over 300 ) years.
The large, thick, leathery palmate leaves have 5 rounded coarsely toothed lobes. They reach around 7 x 7 inches but can be as large as 8 x 11 inches on vigorous shoots. The summer foliage is black-green and smooth above and blue-gray below. The Sycamore Maple leafs out bright green very early and turns to gold in autumn.
The pale yellow flowers hang in long trusses up to 8 inches in length and are replaced in fall by numerous winged fruits up to 1.5 inches wide.
It can seed prolifically and become a weed in some locations. In England it practically is a weed tree.
The red-brown bark peels in irregular plates.
The timber is valuable for veneers.
Tolerant of pollution, clay, high winds, alkaline soils and salt laden winds.
The Sycamore Maple grows best on deep soils and is hardy zones 3 to 7. This Maple is even hardy in Iceland where few hardwood trees grow. This is an excellent tree for extremely exposed sites by the sea.
The leaves scorch easily where summers are excessively hot. The Sycamore Maple grows especially well on Long Island, Cape Cod and cooler parts of New England and Ontario, Canada.

* photo of unknown source found on internet


* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario


* photos taken on Aug 4 2013 in Bayfield, Ontario


'Atropurpureum' ( Purple Sycamore Maple )
Foliage is dark green above and red-purple below. Often seeds true to type. Grows very large.

* photos taken by Milan Havlis, owner of central Europe's premier plant nursery


'Brilliantissimum'
Foliage is striking salmon-pink in spring turning greenish-yellow with green veins in summer. Fall color is poor. Much slower growing only reaching 20 x 20 feet in 20 years with a maximum size of 43 x 27 feet.

* photos taken by Milan Havlis, owner of central Europe's premier plant nursery


'Erythrocarpum'
spectacular bright red young fruits to contrast the foliage.
Reproduced by grafting in late winter to early spring. Seed raised plants are variable.
'Leopoldii'
Spectacular foliage is pinkish at first, maturing to green with gold speckling. Grows very large.

* photo taken by Milan Havlis, owner of central Europe's premier plant nursery


'Nizetii'
The leaves have bold blotches of pinkish white above. They are purplish-green below. This cultivar grows slightly smaller with the largest on record being 100 x 75 feet with a trunk diameter of 5 feet.

'Worleei' ( Golden Sycamore Maple )
Foliage is rich gold-yellow but in the shade it is greenish. Grows large.

Acer pycnanthum ( Japanese Red Maple )
Very similar to Acer rubrum of North America but with smaller leaves to only 3.5 x 2.7 inches. The new foliage in spring is deep red. Some records include - largest on record - 82 feet in height and 6 feet in trunk diameter; 35 years - 55 feet with a trunk diameter of 20 inches. This Maple is recorded living to 1000 years of age! Hardy north to zone 5

Acer rubescens ( Morrison Maple )
Formerly known as Acer morrisonense. This Maple is native to Taiwan and is a fast growing tree to 66 feet in height. Some records include: largest on record - trunk diameter of 2.5 feet. This tree is long lived, potentially exceeding 100 years of age.
The leaves are 3 or 5 pointed lobed, up to 6 x 6 inches on prominent red stalks. This Maple leafs out very early in spring and the leaves are red before turning to green. The leaves also stay green well into November before turning crimson and this Maple is sometimes semi-evergreen with some foliage persisting through the winter.
The winged fruits occur in long pendulous clusters that lasts well into the winter.
The green bark is striped mid gray and light olive green.
Hardy zones 7 to 10

Acer rufinerve ( Red-Vein Maple )
A broadly columnar tree native to mountain woods of Japan. On ideal sites it can be fast growing to 50 feet. Some records include: fastest growth rate - 5 feet; largest on record - 65 x 40 feet with a trunk diameter of 2.3 feet; largest in U.S. - height of 62 feet recorded in Seattle, WA.
The coarsely-toothed foliage appears early in spring and is 3 or 5 lobed. They are verdant light blue-green at first turning to dark green above and paler with tufts of rusty hairs below becoming smooth as summer progresses. The foliage turns scarlet in autumn. The leaves are generally around 5 inches in length but may reach as much as 9.5 x 8 inches.
The yellow-green flowers are small and held in upright racemes in mid spring.
The bark on young trees is bluish green with vertical white stripes and distinctive diamond shape marks. On older trees the bark becomes gray and fissured.
Hardy zones 5 to 7 and prefers partial shade in climates where the summers aren't too hot.

* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.














'Winter Gold'
golden bark

Acer schneiderianum - Acer campbellii subsp 'schneiderianum'

Acer semenovii
Native to central Asia, Iran and Afghanistan; this Maple is a small tree, up to 20 feet, with small 3 lobed leaves to 2 inches in size.
It is a close relative of Acer ginnala and is considered a subspecies of it by some. It differs in having showy, abundant, pink fruits.
May have potential for the central U.S as it is cold and heat tolerant but not tolerant of humidity. Hardy zones 5 to 8. It should be tested in the U.S.

Acer sempervirens ( Cretan Maple )
A very rare slow growing densely branched small evergreen tree. This Maple can reach up to 17 feet in 20 years. The largest recorded is 40 x 51 feet with a trunk diameter of 2 feet. One 40 feet in height does indeed grow at Worlitz, Germany.
This Maple is native to Turkey, Lebanon and the Island of Crete.
The leaves are either unlobed or 3 lobed, shiny green and leathery. They are up to 2 inches in length and this Maple may become semi-evergreen dropping most of its leaves in cold climates. It is a popular subject for bonsai. Hardy zones 6 to 9
It is recorded to have survived below 0 F for 7 weeks with an extreme temperature of -8 F

Acer shirasawanum ( Shira Maple )
Closely related to Acer japonicum; this Maple has a rounded shape and can reach over 30 feet. The largest on record is 72 x 72 feet with a trunk diameter of 2.7 feet.
Moderate growing; the fastest growth rate recorded is 3 feet though on average only about 12 feet in 10 years.
The leaves are up to 5 x 5 inches in size and are rounded with 9 to 13 sharply toothed lobes. They are smooth on both sides and lime green in summer and turn glowing orange to red in the fall. The winged fruits are reddish.
The bark is smooth and gray-brown.
Hardy from zones 4 to 8, tolerating at least as low as -31 F ( reports of zone 3 though this tree has not been thoroughly tested ). It grows best sheltered from hot afternoon sun.
'Aureum'
Clear yellow leaves that turn orange in the fall, it is otherwise similar to the species.

'Red Dawn'
Upright & fast growing to 25 feet in height.
The large foliage is deep red all summer long and turns to scarlet in autumn.

Acer siebolidianum ( Siebold Maple )
Very similar to Acer japonicum but is more cold hardy. Native to Japan; this is a broadly spreading tree to 50 feet in height. It can sometimes grow much larger; the largest on record is 72 x 72 feet with a trunk diameter of 25 inches. Moderate growing to 1.5 feet per year, reaching about 23 feet in 20 years. Acer pseudosieboldii is very similar and equally hardy but is native to Korea and the east coast of Russia.
The leaves are rounded cut almost to the midrib with 7 to 11 sharply-toothed lobes. They are typically 3 x 4 inches but can reach up to 6 x 6 inches in size. The foliage is light green and white hairy at first turning to dark green above and downy beneath. The foliage turns glowing scarlet red in late fall.
The leafstalks and young branches are also finely hairy. The flowers are similar to that of Acer japonicum but are yellow instead of red.
The bark is dark gray-brown and smooth.
THE HARDIEST OF JAPANESE MAPLES!!! This tree is not even injured at -40 F and is even hardy in Manitoba, Canada & Maine. Hardy from zones 3 to 8!

* photo taken on April 11 2010 @ U.S. National Arboretum




* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario



Acer sikkimense ( Hooker Maple )
Native to Yunnan Province in China, Burma, Bhutan and Assam/Sikkim Provinces in India. It is a fast growing large tall tree to 50 feet in height with a trunk diameter up to 1.5 feet. Some records include: 7 years - 30 feet with a trunk diameter of 4 inches.
The foliage is evergreen though it can be semi-deciduous in cold climates. The leaves are ovate and leathery, sometimes with partially developed side lobes. They are shiny intensly bronze-red in the spring turning glossy lush green in the summer and to orange very late in the fall. They are up to 7 x 4 inches in size. The young shoots are reddish.
Hardy zones 7 to 9.

Acer sinense
Reaching up to 60 feet in height with a trunk diameter up to 1.5 feet; this Maple has thick leaves up to 6 x 6 inches that are reddish at first maturing to dark green above and white below. It may only be a subspecies of Acer campbellii

Acer sinopurpurascens
A very rare, moderate growing, medium sized Asian Maple. Some records include: 22 years - 31 feet with a trunk diameter of 10 inches.

Acer stachyophyllum ( Birch Leaf Maple )
Also known as Acer betulifolium. It is a small tree reaching up to 50 feet, that is native to mountain forests from northern India to western China, south into Burma.
The unlobed to 3-lobed, ovate to oblong, pointed leaves, up to 4.3 x 2.5 inches are glossy green, turning to yellow in autumn.
The bark is smooth and yellowish-brown.
Hardy to zones 5b to 8a; at least -15 F with no damage. Excellent fall color.

Acer sterculiaceum
Also known as Acer villosum; this Maple is native to a wide area of China and the Himalayas and is similar in appearance to the Norway Maple when young. It can become a large tree with thick branches and a spreading habit. The largest on record is 70 x 70 feet with a trunk diameter of 25 inches. Very vigorous; it can reach up to 33 x 20 feet in 20 years and the record growth rate is 4.5 feet.
The handsome leathery foliage is large up to 12 x 12 inches and the leafstalks are long up to 12 inches. The leaves are made up of 3 to 5 forward pointing lobes with few additional teeth. It is early to leaf out in spring.
Since the trees are of different sexes; seeds are rarely produced in cultivation. They are green and very large over 2 inches across.
The bark is dark brown and fissured. Very heat tolerant and hardy from zones 5 to 9.

* photo taken on April 11 2010 @ U.S. National Arboretum



* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.






subsp. 'franchetii'
has hairier leaves that are always 5 lobed. They reach up to 8 x 6 inches in size
and appear very early in spring. This Maple reaches up to 66 feet in height and grows vigorously.

* photo taken on April 11 2010 @ U.S. National Arboretum


* photo taken on May 1 2010 @ U.S. National Arboretum, D.C.



* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.



* photo taken on June 23 2013 @ U.S. National Arboretum, DC


subsp. 'thompsonii'
Very large leaves to over 12 inches across.
It is otherwise similar to the species.
Acer takeshimense
An extremely rare Chinese relative of Acer japonicum. Moderate growing, up to a foot per year and reaching up to 30 feet in height.
The foliage is deep green.

* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA




Acer tataricum ( Tatarian Maple )
Closely related to Acer ginnala; this Maple is native to China, Korea and Japan. It is a small, fast growing, broad spreading tree typically to 30 feet in height. With great age on ideal sites; it can grow much larger with the record being 80 x 75 feet with a trunk diameter of 3.7 feet. Fast growing; it has the potential of reaching up to 24 feet in height in only 5 years. The foliage is ovate and shallowly lobed with 3 lobes. Unlike Acer ginnale; the lobes are not toothed. The leaves reach up to 4 inches or rarely to 6 x 4 inches in size and are glossy dark green turning brilliant orange and scarlet in the fall.
The fruits are abundant in long drooping clusters. They have wide red wings.
The bark is thin, pale brown, and smooth at first but becoming shallowly fissured on old plants
Fairly common in cooler climates in North America; this Maple is tolerant of salt and alkaline soils. It is generally free of pests or disease and grows well in both moist or dry soils. It is an excellent choice for the northern Great Plains and is recorded as growing to 25 x 30 feet in North Dakota. In Russia it is valued for farmland shelterbelts.
Hardy zones 3 to 8 and tolerating as cold as -50 F.


* photos taken on August 3 2010 @ University of Guelph Arboretum, Ontario





'Bailey's Compact'
More shrublike and compact, reaching up to 10 x 15 feet in 10 years, and never exceeding 16 feet. The glossy deep green foliage colors well to reddish-purple during autumn.

'Mozart'
Pyramidal with a central trunk. Foliage turns scarlet in the fall.

'Red November'
Displays superior red fall color in the southern U.S.; otherwise identical to species.

Acer tegmentosum ( Manchurian Maple )
Native to moist soils in Russia, Manchuria and Korea. This Maple is a medium-sized tree reaching up to 40 feet; the largest on record is 60 x 36 feet with a trunk diameter of 1.6 feet. Supposedly moderately growing; I did see one with 5 feet of new growth on it. Some records include: 10 years - 20 x 17 feet; 30 years - 35 feet with a trunk diameter of 10 inches.
The foliage appears very early in spring and is up to 10 x 10 inches in size. The leaves turn golden yellow in the fall. They flush earlier in the spring than the similar Acer pennsylvanicum and are bright yellow-green at first, turning to bright green.
The flowers and fruit hang in pendulous clusters.
The young shoots are bluish and the older bark is green with white vertical stripes.
The winter twigs are yellow-green.
Hardy zones 3 to 8 in partial shade on moderately moist, humus-rich, fertile, well drained soil. Flood tolerant. Though especially well adapted to cool climates I have seen this tree thriving in part shade in the Washington, D.C. area as it is also known to grow in Chicago.

* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.







* photos taken on May 6 2010 @ Brookside Gardens, Wheaton, MD




* photo taken on August 3 2010 @ University of Guelph Arboretum, Ontario

* photos taken on June 23 2013 @ U.S. National Arboretum, DC


'White Tigress'
Pure white bark rivalling all birches. The bark should be protected from full sun.

* photos taken on May 6 2010 @ Brookside Gardens, Wheaton, MD



* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA








Acer tetramerum ( Birchleaf Maple )
Also called Acer stachyophyllum. A moderate growing Maple to 40 feet with the largest on record being 66 x 50 feet with a trunk diameter of 3 feet. It is rare in the U.S. however well adapted. Reported to have grown to 4 feet in 3 years in North Carolina.
The fastest growth rate recorded is 2 feet.
The foliage appears like that of the Birch and is up to 5 x 2.5 inches in size.
The younger stems are red, giving much winter interest.
Native to central China and hardy north to zone 6. Has been successfully grown in England.

Acer trautvetteri ( Red-Bud Maple )
Native to the Caucasus and northern Turkey and reaching up to 82 feet in height
with a trunk diameter of 2.5 feet. Moderate growing with the fastest growth rate recorded being 3 feet.
Endangered in Armenia due to decrease in natural habitat and being cut for its hight quality wood.
This Maple has palmately deeply 3-lobed, coarsely-toothed leaves. The handsome foliage is glossy deep green above, blue-green beneath. The leaves are up to 7 x 8 inches in size and turn carmine-orange in the fall. The leaves are borne on long red stalks. They emerge vibrant bright green in early spring contrasting with the bright red bud scales.
The small yellow flowers are borne in small upright clusters in April.
The keys are red and spreading to 2 inches.
Hardy zones 6 to 9 and likes humidity and limestone soils. It is sometimes considered a subspecies of Acer heldreichii ( Greek Maple )

Acer trifolium ( Three Flower Maple ) -

The Three Flower Maple is a native to China & Korea with very ornamental orange-red distinctive bark. It is usually slow growing ( 25 feet in 20 years ) but can grow up to 4 feet per year on ideal sites and reach 90 x 45 fet with a trunk diameter of 26 inches though usually maturing at half that. The canopy is very dense on this storm resistant tree.
In the U.S.; a very large one grows at Arnold Arboretum in Boston.
Its leaves are composed of 3 leaflets reaching up to 5.5 x 2.5 inches. It leafs out very early in the spring reddish in color and the leaves turn dark green all summer turning intense red late in the fall before falling.
The yellow flowers occur in small drooping clusters of 3 in mid spring.
The bark is orange-red and peels vertically.
It is hardy from zones 3 to 8 and can tolerate temperatures as low as -40F and grows well in sun or shade.
* photos taken @ U.S. National Arboretum on Feb 2009









* photo taken on April 11 2010 @ U.S. National Arboretum




* photos taken on May 8 2010 @ U.S. National Arboretum, D.C.


* photos taken on May 16 2010 @ Cylburn Arboretum, Baltimore, MD



* photos taken on May 17 2011 in Howard Co., Maryland


* photos taken on Aug 25 2011 @ Scott Arboretum, Swarthmore College, PA


* photo taken on June 23 2013 @ U.S. National Arboretum, DC


Acer truncatum ( Shantung Maple )
A large dome shaped tree native to northern China, Manchuria to Korea and Japan where it is a popular street tree. Outside of China it is rare despite that it makes an excellent shade tree that is very easy to grow. Moderate growing; some records include: 4 years - 10 feet in height and 2 inches in trunk diameter; 7 years - 19 x 13.5 feet with a trunk diameter of 6.8 inches; 15 years - 30 x 25 feet with a trunk diameter of 1.4 feet; largest on record - 85 x 60 feet with a 3 foot trunk diameter.
The 5 to 7 untoothed lobes leaves are up to 6 x 8 inches in size. They are reddish-purple at first in spring turning to very shiny green in summer then to flaming orange or red late in the fall. It leafs out early in spring and is one of the last Maples to drop its leaves in the fall. The foliage is very scorch resistant.
The bark is brown.
Very heat, drought, alkaline soil, urban and pollution tolerant; this Maple grows anywhere rainfall exceeds 20 inches in a year. It is much hardier in the U.S. Midwest and southeast than the Norway Maple. Hardy zones 3 to 8 tolerating as low as -40 F.
It is rarely bothered by pests or disease.

* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA






'Fire Dragon'
Vigorous and heat tolerant, even in Texas.
The foliage turns intense scarlet-red during autumn.

'Pacific Sunset'
A hybrid with Acer platanoides and is very fast growing.
The very attractive, glossy foliage turns to scarlet-red during early autumn.

Acer tschonoskii
Native to Japan & Korea; this tree is easy to grow though very rare. It is moderate growing to 28 inches per year to as much as 20 x 15 feet in 20 years. Eventually to 30 feet; the largest on record is 43 x 30 feet with a trunk diameter of 8 inches. It can live over 50 years.
The leaves are sculptured and 5 to 7 lobed. They are up to 6 x 4 inches in size and are dark green turning orange to red late in the fall. This Maple is also very early leafing out in spring when the new foliage is reddish in color.
Viable seed is rarely set.
The branches are green with inconspicuous stripes. Hardy from zone 4 to 8.



Acer tsinglingense ( Tsingling Maple )
I seen this tree for the first time at Morris Arboretum in Philly on July 17 2010. It is an endangered Chinese native and is very similar to Acer saccharum ( Sugar Maple ) in appearance. It appears to grow at a rate up to 2.5 feet per year and it appears to be very heat tolerant being that it was luxuriating in the worst heatwave in recorded history. With much potential as a landscape tree, this tree should be tested alot more in different climates in North America.

* photos taken on July 17 2010 @ Morris Arboretum, Philly, PA







Acer velutinum ( Velvet Maple )
From the Caucasus and northern Iran; this Maple resembles Acer pseudoplatanus. It grows fast to 60 feet in 20 years and eventually much larger to 90 feet or more. The largest on record is 140 x 80 feet with a trunk diameter of 7 feet. The attractive dark green leaves are long stalked, coarsely toothed and 5 lobed. The leaves are up to 10 x 12 inches and are light green and very downy underneath. The stalks are up to 12 inches in length. The foliage is very luxuriant and attractive. It is somewhat drooping like Acer nigrum of the U.S. and also turns yellow-orange in fall.
The flowers are in abundant large upright clusters followed by wide spreading pairs of winged fruits.
The bark is light brown and smooth.
Hardy from zone 5 to 8; this tree requires hot summers to thrive. It is grown as a street tree in Russia and is well adapted though rare in much of North America. Easily grown from seed.

* photo of unknown internet source


Acer villosum - now known as Acer sterculiaceum

Acer wilsonii ( Wilson's Maple )
Rapid growing to a maximum of 45 feet in height. This Maple may be a subspecies of Acer campbellii. It is native to southwestern China.
The 3-lobed leaves are smaller to only 4 x 4 inches and are blue-green below.
Hardy zones 7 and warmer.

Acer x zoeschense ( Zoeschense Maple )
A hybrid between Acer lobelii and Acer campestre; this hybrid Maple has larger purple tinged bright green leaves with 5 lobes. The shiny leaves are up to 8 x 5 inches in size.
A large tree; the record is 115 x 90 feet with a trunk diameter of 7 feet.
Hardy zones 5 to 8.

'Annae'
leaves dark red at first later turning to green