- Smoke tree
taxobox
name = Smoke Tree
image_caption = Smoketree flowerhead with fruit anddew droplets
regnum =Plantae
unranked_divisio =Angiosperms
unranked_classis =Eudicots
unranked_ordo =Rosids
ordo =Sapindales
familia =Anacardiaceae
genus = "Cotinus"
genus_authority =Adans.
subdivision_ranks = Species
subdivision = "Cotinus coggygria " "Cotinus obovatus "|Smoketree or Smoke bush ("Cotinus") is a
genus of twospecies offlowering plant s in the familyAnacardiaceae , closely related to thesumac s ("Rhus"). They are largeshrub s or smalltree s, native to the warm temperateNorthern Hemisphere . The leaves aredeciduous , alternate, simple oval shape, 3-13 cm long. Theflower s are clustered in a large open terminal panicles 15-30 cm long with a fluffy grayish-buff appearance resembling a cloud of smoke over the plant, from which the name derives. Thefruit is a smalldrupe with a singleseed . Often classified in "Rhus" in the past, they are distinguished by the leaves being simple (not pinnate) and the 'smoke-like' fluffy flower heads.The American Smoketree ("Cotinus obovatus", syn. "Rhus cotinoides") is native to the southeastern
United States , fromTennessee south toAlabama and west to easternTexas . It is a larger plant, frequently becoming a small tree up to 10-12 m tall and with a trunk up to 25 cm diameter. The leaves are also larger, 6-13 cm long; it also has varied but very bright fall color, usually brighter than the Eurasian species. The flower heads are usually sparser than in "C. coggygria".Cultivation and uses
The smoketrees, particularly "C. coggygria", are popular
garden shrubs. Several bronze or purple-leavedcultivar s of "C. coggygria" have been selected, with warm pink inflorescences set against purple-black foliage; the commonest in commerce are 'Notcutt's Variety' and 'Royal Purple'. When brought into cultivation together, the two species will form hybrids; some garden cultivars are of this parentage. Cultivation is best in dry, infertile soils, which keeps the growth habit more compact and also improves the autumn colour; when planted in fertile soil, they become large, coarse and also tend to be short-lived, succumbing to verticillium wilt disease. Both species can becoppice d in early spring, to produce first-year shoots up to 2 m tall with large handsome leaves, but no "smoke".External links
* [http://www.arborday.org/trees/treeguide/TreeDetail.cfm?ID=32 Tree Guide - Smoke Tree]
* [http://www.wcisel.com/plants/smoketree/ Tree Topics - Smoke Tree]
* [http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cotinus_coggygria.html Smoke Tree]
* [http://www.cas.vanderbilt.edu/bioimages/species/frame/coob2.htm "Cotinus obovatus" images at bioimages.vanderbilt.edu]
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