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FOC | Family List | FOC Vol. 5 | Ulmaceae | Ulmus

18. Ulmus androssowii Litvinov var. subhirsuta (C. K. Schneider) P. H. Huang et al., Bull. Bot. Res., Harbin. 11(3): 43. 1991.

毛枝榆 mao zhi yu

Ulmus wilsoniana C. K. Schneider var. subhirsuta C. K. Schneider in Sargent, Pl. Wilson. 3: 257. 1916; U. androssowii var. virgata (Wallich ex Planchon) Grudzinskaja; U. chumlia Melville & Heybroek; U. pumila var. pilosa Rehder; U. virgata Wallich ex Planchon.

Trees, to 20 m tall, d.b.h. to 50 cm, deciduous. Bark blackish gray, longitudinally fissured. Branchlets densely pubescent when young but second year ± pubescent, sometimes with an irregularly longitudinally fissured corky layer, with scattered lenticels. Winter buds ovoid; bud scales pubescent. Petiole 2-10 mm, pubescent or glabrous; leaf blade ovate to elliptic to rarely rhombic or obovate, 3-8 × 2-2.5 cm, abaxially sparsely pubescent or glabrous and somewhat pubescent or glabrous on veins and with tufted hairs in vein axils, adaxially ± scabrous, hirsute when young, glabrescent with trichome scars, and puberulous along veins or glabrous, base slightly oblique, apex usually acuminate. Inflorescences fascicled cymes on second year branchlets. Perianth campanulate, 5-lobed, margin ciliate. Samaras orbicular to ± orbicular, 8-15 × 6-10 mm, glabrous except for pubescence on stigmatic surface in notch; stalk shorter than perianth, pubescent; perianth persistent. Seed at center of samara. Fl. and fr. Feb-Apr.

* Broad-leaved forests on mountain slopes and in valleys; 1200-2800 m. Sichuan, Xizang, Yunnan.

Ulmus androssowii var. androssowii occurs in C Asia (not China).


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