Acer griseum

Life-forms

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
Section: Acer sect. Trifoliata
Species: Acer griseum
Name

Acer griseum (Franch.) Pax, in H.G.A.Engler (ed.), Pflanzenr., IV, 163: 30 (1902).
Synonyms

Acer nikoense var. griseum Franchet (basionym)
Acer leiopodum (Handel-Mazzetti) W.P.Fang & H.F.Chow
Acer pedunculatum K.S.Hao
Acer shensiense W.P.Fang & L.C.Hu
Acer triflorum var. leiopodum Handel-Mazzetti
Acer triflorum subsp. leiopodum (Handel-Mazzetti) A.E.Murray
Acer zhongtiaoense W.P.Fang & B.L.Li
Crula grisea (Franchet) Nieuwland

References
Additional references

Murray, A.E., 1970. A monograph of the Aceraceae. Unpublished Ph.D. dissertation, The Pennsylvania State University. Reference page.
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.
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 griseum in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Aiello, A. & Crowley, D. 2019. Acer griseum. The IUCN Red List of Threatened Species 2019. IUCN Red List Category: Endangered. DOI: 10.2305/IUCN.UK.2019-1.RLTS.T193593A2244567.en.
Govaerts, R. et al. 2020. Acer griseum in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 January 10. Reference page.
International Plant Names Index. 2020. Acer griseum. Published online. Accessed: 10 January 2020.

Vernacular names
العربية: قيقب رمادي
dansk: Papirbark-Løn
Deutsch: Zimt-Ahorn
English: Paperbark Maple
español: Arce chino gris
français: Érable à écorce de papier
polski: Klon strzępiastokory
русский: Клён серый
slovenščina: Sivi javor
svenska: Kopparlönn
中文: 血皮槭

Acer griseum, the paperbark maple or blood-bark maple,[3] is a species of flowering plant in the family Sapindaceae, native to central China.[4] Acer griseum is found in the Chinese provinces of Gansu, Henan, Hubei, Hunan, Shaanxi, Shanxi and Sichuan, at altitudes of 1,500–2,000 m (4,921–6,562 ft).[4]

Description

It is a small to medium-sized deciduous tree, reaching 6–9 m (20–30 ft) tall and 5–6 m (16–20 ft) wide, with a trunk up to 70 cm (28 in) in circumference.[5] 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.[4]

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.[4]

The yellow flowers are androdioecious, produced in small pendent corymbs in spring, the fruit being a paired samara with two winged seeds about 1 cm long with a 3 cm wing.[4][6][7]
Cultivation and uses

Acer griseum was introduced to cultivation in Europe in 1901 by Ernest Henry Wilson for the Veitch Nurseries in the UK, and to North America shortly after. It is one of many species of maples widely grown as ornamental plants 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. Cultivars include the columnar Copper Rocket.

This plant has gained the Royal Horticultural Society's Award of Garden Merit.[8]

In 2015, the North America-China Plant Exploration Consortium (NACPEC) conducted an expedition specifically targeting Acer griseum for seed collection with the object of increasing the genetic diversity of plants in cultivation.[9] Propagation of Acer griseum is somewhat difficult as seeds have the same parthenocarpic tendencies as those of Acer maximowiczianum.[10]

References

Aiello, A.; Crowley, D. (2019). "Acer griseum". IUCN Red List of Threatened Species. 2019: e.T193593A2244567. doi:10.2305/IUCN.UK.2019-1.RLTS.T193593A2244567.en. Retrieved 19 November 2021.
"Acer griseum (Franch.) Pax — The Plant List". www.theplantlist.org.
https://www.washingtonpost.com/lifestyle/home/this-unique-tree-is-vastly-underappreciated--and-its-dying-out/2016/07/12/c665594e-4469-11e6-88d0-6adee48be8bc_story.html
Flora of China (draft): Acer griseum
"Paperbark Maple - Acer griseum". www.maple-trees.com.
Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1405332965.
"RHS Plant Selector - Acer griseum". Retrieved 23 February 2020.
"2015 North America-China Plant Exploration Consortium (NACPEC) Expedition to collect Acer griseum". Retrieved 1 October 2019.[permanent dead link]
van Gelderen, C. J., & van Gelderen, D. M. (1999). Maples for Gardens: A Color Encyclopedia.