无翅山黧豆 wu chi shan li dou

Lathyrus palustris subsp. exalatus H. P. Tsui, Bull. Bot. Res., Harbin 4(1): 54. 1984; L. palustris f. exalatus H. P. Tsui; L. palustris f. pubescens H. P. Tsui; L. palustris var. pubescens (H. P. Tsui) X. Y. Zhu.

Plants glabrous to pubescent. Stem wingless. Stipules large, 12-25(-30) × 2-8 mm; leaflets usually broadly lanceo­late, 30-60 × 5-10(-15) cm, veins subparallel. Raceme lax, (2 or)3-8(-10)-flowered.

● Shanxi, Sichuan, Xinjiang, Xizang, Yunnan.

Pubescent plants have been separated at the form and varietal levels, but close observation shows a continuum from glabrous to pu­berulent to pubescent individuals, with no clear separation into two groups. Consequently, we treat this as a single variety under the sub­species.