Acer buergerianum

Acer buergerianum

taxobox
name = "Acer buergerianum"



image_caption = Foliage of a young tree
regnum = Plantae
unranked_divisio = Angiosperms
unranked_classis = Eudicots
unranked_ordo = Rosids
ordo = Sapindales
familia = Sapindaceae
genus = "Acer"
species = "A. buergerianum"
binomial = "Acer buergerianum"
binomial_authority = Miq.|

"Acer buergerianum" (Trident Maple; Chinese: 三角枫 "san jiao feng") is a species of maple native to eastern China (from Shandong west to southeastern Gansu, south to Guangdong and southwest to Sichuan) and Taiwan.Flora of China (draft): [http://web.archive.org/web/20060209210809/http://hua.huh.harvard.edu/china/mss/volume11/Aceraceae-AGH_coauthoring.htm Aceraceae] ] Germplasm Resources Information Network: [http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?1088 "Acer buergerianum"] ]

Description

It is a small to medium-sized deciduous tree reaching a height of 5-20 m with a trunk up to 50 cm diameter. The leaves are in opposite pairs, 2.5-8 cm long (excluding the 2-5 cm petiole) and 3.5–6.5 cm broad, hard, glossy dark green above, paler below, usually with three lobes; on mature trees the lobes forward-pointing and with smooth margins, on young trees with more spreading lobes and serrated margins. The flowers are produced in spring, yellow-green, in pendulous corymbs; they are small, with five greenish sepals and five yellow-white petals about 2 mm long, and eight stamens. The fruit is a samara with two winged seeds, each seed 4-7 mm diameter, with a 15 mm wing; the wings are forward-pointing and often overlapping each other.van Gelderen, C.J. & van Gelderen, D.M. (1999). "Maples for Gardens: A Color Encyclopedia"] Rushforth, K. (1999). "Trees of Britain and Europe". Collins ISBN 0-00-220013-9.]

The species is variable, and a number of varieties have been described:
*"Acer buergerianum" var. "buergerianum". Hubei, Hunan, Jiangsu, Jiangxi, Shandong, Zhejiang.
*"Acer buergerianum" var. "jiujiangense" Z.X.Yu. Jiangxi.
*"Acer buergerianum" var. "horizontale" F.P.Metcalf. Southern Zhejiang.
*"Acer buergerianum" var. "formosanum" (Hayata ex Koidzumi) Sasaki. Taiwan (endemic).
*"Acer buergerianum" var. "kaiscianense" (Pampanini) W.P.Fang. Gansu, Hubei, Shaanxi.
*"Acer buergerianum" var. "yentangense" W.P.Fang & M.Y.Fang. Zhejiang.

A few trees have consistently unlobed leaves; these were first described as a variety "A. trifidium" var. "integrifolium" Makino ("A. trifidium" is an old synonym of "A. buergerianum"), but are now not distinguished from the species.Makino Herbarium, Tokyo: [http://taxa.soken.ac.jp/makinodb/makino/prep_e/MAK151133.html "Acer trifidium"] ] Occasional unlobed leaves also occur on most trees with otherwise normal three-lobed leaves.Mitchell, A. F. (1974). "A Field Guide to the Trees of Britain and Northern Europe". Collins ISBN 0-00-212035-6]

Cultivation

It is widely grown in temperate regions as an ornamental tree. It was introduced very early to Japan, where its name translates as "China maple".Kanon tree book: [http://kanon101.cool.ne.jp/foto_sinrin/K_kaede/to_kaede/to_kaede.htm "Acer buergerianum"] (in Japanese; [http://translate.google.com/translate?hl=en&sl=ja&u=http://kanon101.cool.ne.jp/foto_sinrin/K_kaede/to_kaede/to_kaede.htm&sa=X&oi=translate& google translation] )] More recently, it was introduced to Europe and North America in 1896, and is now occasionally grown in parks and large gardens there. Mature examples may be seen at Westonbirt Arboretum in England, the Esveld Aceretum in Boskoop, Netherlands, Arnold Arboretum in Boston, Massachusetts and many other locations.

Bonsai

Trident Maple is a popular choice for the art of bonsai and responds well to techniques that create leaf reduction and ramification.

Cultivars

Several interesting cultivars have been developed, many of these bear Japanese names. Notable cultivars include 'Goshiki Kaede' (striking pink and green variegation), 'Kifu Nishiki' (roundish, almost un-lobed leaves), 'Mino Yatsubusa' (dwarf with long, narrow leaves) 'Mitsubato Kaede' (distinctive cork-like trunk) and 'Naruto' (strongly incurved leaf surface).

References


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