Tuesday, May 11, 2010

Acer griseum : Bonsai, maple tree, red



Scientific classification
Kingdom:        Plantae
(unranked):     Angiosperms
(unranked):     Eudicots
(unranked):     Rosids
Order:            Sapindales
Family:           Sapindaceae
Genus:            Acer
Species:          A. griseum

Hardness Zone : 4 to 8
Botanical NameAcer griseumAY-sir GRIS-ee-um

Common Name: Paperbark maple

GenusAcer

This slow-growing understory tree has highly ornamental, peeling orange-cinnamon bark. Its dark green, three-lobed leaves turn a brilliant orange-red in autumn.

Noteworthy characteristics: One of the best small ornamental trees, paperbark maple has small yellow flowers in spring, great fall foliage color, picturesque peeling park, and a stately habit.

Care: Best in moist, well-drained soil in sun to part shade.

Propagation: Sow fresh seeds in a container, or graft cuttings in late winter.

Problems: Aphids, scale and caterpillars. Mites can cause leaf spot gall. Fungal leaf spots and root rots are common.
Mobot.org Says
Common Name: paperbark maple
Zone: 4 to 8 
Plant Type: Tree
Family: Sapindaceae
Missouri Native: No
Native Range: Central China
Height: 20 to 30 feet
Spread: 15 to 25 feet
Bloom Time: April
Bloom Color: Green
Sun: Full sun to part shade
Water: Medium
Maintenance: Low
General Culture:
Easily grown in average, medium, well-drained soil in full sun to part shade.
Noteworthy Characteristics:
This small, deciduous, oval to oval-rounded paperbark maple tree is noted for its peeling, cinnamon to reddish brown bark. Trifoliate leaves are dark green, but turn red in the fall. Seed is a two winged samara.
No serious disease or pest problems. Tree is a slow grower (6 inches - 12 inches per year). Prefers moist, well-drained soil, but does well in clay soils.
Uses:
Excellent small tree for small properties. Appropriate as an understory tree in a woodland garden or as a specimen in many locations around the home.
Fine Gardening
Overview
Height                     15 ft. to 30 ft.
Spread                    15 ft. to 30 ft.
Growth Pace            Slow Grower
Light                       Full Sun to Part Shade
Moisture                  Medium Moisture
Characteristics          Interesting Bark; Showy Fall Foliage
Bloom Time              Early Spring; Spring
Flower Color             Yellow Flower
Uses                       Specimen Plant/ Focal Point
Style                       Woodland Garden
Seasonal Interest      Winter Interest, Spring Interest, Summer Interest, Fall Interest
Type                       Trees

Wikipedia
Acer griseum (Paperbark Maple; simplified Chinese: 血皮; traditional Chinese: 血皮楓; pinyin: xuè pí fēng) is a species of maple native to central China, in the provinces of Gansu, Henan, Hubei, Hunan, Shaanxi, Shanxi, and Sichuan, at altitudes of 1,500–2,000 m.
It is a small to medium-sized deciduous tree, reaching 6-9 m (20-30 ft) tall, 5-6 m (15-25 ft) wide, with a trunk up to 70 cm (2 ft) diameter. The bark is smooth, shiny orange-red, peeling in thin, papery layers; it may become fissured in old trees. The shoots are densely downy at first, this wearing off by the second or third year and the bark exfoliating by the third or fourth year. The leaves are compound, with a 2–4 cm petiole with three leaflets, each 3-10 cm long and 2-6 cm broad, dark green above, bright glaucous blue-green beneath, with several blunt teeth on the margins. The flowers are androdioecious, produced in small corymbs in spring, the fruit being a paired samara with two winged seeds about 1 cm long with a 3 cm wing.
Cultivation And uses
Paperbark Maple is widely grown as an ornamental plant in temperate regions. It is admired for its decorative exfoliating bark, translucent pieces of which often stay attached to the branches until worn away. It also has spectacular autumn foliage which can include red, orange and pink tones.
It was introduced to cultivation in Europe in 1901 by Ernest Henry Wilson for the Veitch Nurseries, and to North America shortly after.
Recent attempts have been made to acquire new seed stock from wild populations in China because it is believed that the current gene pool of cultivated specimens is very small. Propagation of Acer griseum is somewhat difficult as seeds have the same parthenocarpic tendencies as those of Acer maximowiczianum.

hort.uconn.edu
Habitat
  • native to China
  • zone 4
Habit and Form
  • to 30' tall, small tree
  • deciduous
  • shape is oval, upright or irregular
  • short main trunk with several secondary, more or less upright scaffold trunks
  • texture is fine to medium
  • slow growing
Summer Foliage
  • opposite, trifoliate leaves 3" to 5" long
  • soft, blue-green color, almost frosty or white on underside
Autumn Foliage
  • can be a pronounced red, but frequently is green with red overtones on exposed leaf surfaces
  • last trifoliate maple to color
Flowers
  • green, inconspicuous
Fruit
  • samaras, 1.5" to 2" long, pubescent nutlet
Bark
  • exfoliating cinnamon-brown bark, peeling in thin sheets and also polished smooth in places
  • very attractive bark, a strong ornamental feature
Culture
  • relatively pest free
  • prefers a moist, well-drained, slightly acidic soil
  • full sun or partial shade
Landscape Uses
  • specimen
  • possibly in mini-groves
  • edge of woods
  • good choice for small yards
Liabilities
  • may be somewhat expensive
  • once rare and pricey, but becoming readily available
ID Features
  • trifoliate leaves and exfoliating cinnamon-brown bark
  • buds sharply pointed and dark purplish-brown
Propagation
  • by seed, but only around 5% of the samaras are viable
  • has been grafted on Acer saccharum with some success
  • cuttings from hedgedseedling (juvenile) plants can be rooted
Cultivars/Varieties
Hybrids between A. nikoense and A. griseum have been cultivated. Dr. Sid Waxman, University of Connecticut, has selected such a hybrid and named it'Cinnamon Flake'. This attractive plant features bark that flakes in smaller strips than the species. The stem surface often appears pleated like corduroy.
'Ginzam' (Gingerbread™) - A hybrid of A. griseum and A. nikoense that features fine bark and a faster growth rate than the species, maturing at 30' tall. A tree with these traits may hold great promise in the future.

No comments:

Post a Comment