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Acer truncatum Leaf

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Sapindales

Familia: Sapindaceae
Subfamilia: Hippocastanoideae
Tribus: Acereae
Genus: Acer
Species: Acer truncatum
Name

Acer truncatum Bunge, Enum. Pl. China Bor.: 10 (1833).
References
Additional references

Gelderen, D.M. van, Jong, P.C.de & Oterdoom, H.J. 1994. Maples of the world. Timber Press, Portland, Or., 458 pp. ISBN 0-88192-000-2. Reference page.
Govaerts, R.H.A. 1995. World Checklist of Seed Plants 1(1, 2). 483, 529 pp. MIM, Deurne. ISBN 90-341-0852-X (issue 1) ISBN 90-341-0853-8 (issue 2). Reference page.
Murray, A.E., 1970. A monograph of the Aceraceae. Unpublished Ph.D. dissertation, The Pennsylvania State University. Reference page.
Hsu, T.Z., Chen, Y.S., Jong, P.C.de, Oterdoom, H.J. & Chang, C.S. 2008. Acer. Pp. 537 in Wu, Zh.Y. , Raven, P.H. & Hong, D.Y. (eds.), Flora of China. Volume 11: Oxalidaceae through Aceraceae. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, ISBN 978-1-930723-73-3. efloras PDF Reference page.

Links

USDA, ARS, Germplasm Resources Information Network. Acer truncatum in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Chen, Y., Gibbs, D. & Oldfield, S. 2018.. Acer truncatum. The IUCN Red List of Threatened Species 2018. IUCN Red List Category: Least Concern. DOI: 10.2305/IUCN.UK.2018-1.RLTS.T193886A2288883.en.
Govaerts, R. et al. 2020. Acer truncatum in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 January 8. Reference page.
International Plant Names Index. 2020. Acer truncatum. Published online. Accessed: 8 January 2020.

Vernacular names
Deutsch: Chinesischer Spitz-Ahorn
English: Shandong Maple
polski: Klon ściętolistny
русский: Клён усечённый
中文: 元宝枫

Acer truncatum, the Shantung maple,[1] Shandong maple, or purpleblow maple, is a maple native to northern China, in the provinces of Gansu, Hebei, Henan, Jiangsu, Jilin, Liaoning, Inner Mongolia, Shaanxi, Shandong, Shanxi, and to Korea.[2]

It is a medium-sized deciduous tree growing to 15 metres (49 ft) tall with a broad, rounded crown. The bark is smooth on young trees, becoming shallowly ridged with age. The leaves are opposite, palmately lobed with five lobes, 5 centimetres (2.0 in) to 12 centimetres (4.7 in) long and 7 centimetres (2.8 in) to 11 millimetres (0.43 in) broad, with a 3 centimetres (1.2 in) to 10 millimetres (0.39 in) petiole; the lobes are usually entire, but occasionally with a pair of teeth on the largest central lobe, and the margin is often wavy. The petiole bleeds a milky latex when broken. The flowers are in corymbs, yellow-green with five petals 5 millimetres (0.20 in) to 7 millimetres (0.28 in) long; flowering occurs in early spring. The fruit is a double samara with two winged seeds, the seeds are disc-shaped, slightly flattened, 13 millimetres (0.51 in) to 18 millimetres (0.71 in) across. The wings are 2 centimetres (0.79 in) long, widely spread, approaching a 180° angle. The bark is greenish-grey, smooth in young trees, becoming shallowly grooved in mature.[2][3][4]

It is closely related to, and often difficult to distinguish from, Acer amplum, Acer cappadocicum, and Acer pictum subsp. mono, which replace it further south and west in China, and in Japan. From Acer cappadocicum it is best distinguished by the shoots which turn brown by their first winter, not remaining green for several years.[4] From Acer mono (syn. A. pictum auct. non Thunb.) it is best distinguished by the larger, thicker (less flattened) seeds. Acer truncatum is very unusual among maples in showing hypogeal germination.[5]
Cultivation and uses

Shantung maple is grown as an ornamental plant in Europe and North America.[3][4]

A number of cultivars have been selected, including 'Akikaze Nishiki' with variegated leaves, 'Fire Dragon' with very bright autumn colour.[3] The cultivar 'Keithsform' (Norwegian Sunset) is a hybrid between Acer truncatum and Acer platanoides (Norway Maple).[6]
AcerTruncatumBark.tif
References

BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
Tingzhi Xu; Yousheng Chen; Piet C. de Jong; Herman John Oterdoom; Chin-Sung Chang. "Acer truncatum". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 14 May 2015.
Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN 0-333-47494-5.
Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
Flora of China (draft): Acer truncatum[permanent dead link]
Oregon State University: Norwegian Sunset Archived 2011-05-15 at the Wayback Machine

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