Ulmus macrocarpa var. macrocarpa

Ulmus macrocarpa var. macrocarpa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Ulmaceae
Genus: Ulmus
Species:
U. macrocarpa

Variety:
U. m. var. macrocarpa
Trinomial name
Ulmus macrocarpa var. macrocarpa
Synonyms
  • Ulmus macrocarpa var. mandshurica Skvortsov
  • Ulmus macrocarpa var. mongolica Liou & Li
  • Ulmus macrocarpa var. nana Liou & Li
  • Ulmus macrophylla Nakai

Ulmus macrocarpa var. macrocarpa L. K. Fu is found on hillslopes and in valleys at elevations of 700–800 m in the Chinese provinces of Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Mongol, eastern Qinghai, Shaanxi, Shanxi, Shandong. Beyond China it is also found in Korea, Mongolia, and Russia (Siberia).[1]

Fu sank Ulmus taihangshanensis S.Y.Wang as a synonym for this variety, but U. taihangshanensis, as described from Henan, differs in having more pubescent twigs which never develop corky wings, and thinner leaves (papery rather than leathery). [1] [2]. U. taihangshanensis has more recently been sunk as a synonym of Ulmus lamellosa.

Description

The tree is distinguished by a "leaf blade abaxially sparsely pubescent, adaxially hirsute or with convex trichome scars, base attenauted to rounded, apex shortly caudate. Samara pubescent, apically concave or rounded, wings thick, stigmas pubescent. Fl. Mar., fr., Apr."[1]

Pests and diseases

No information available.

Cultivation

The tree is very rare in cultivation beyond Asia.

Accessions

Europe

References

  1. ^ a b c Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. [1]