大叶山扁豆 da ye shan bian dou

Cassia leschenaultiana Candolle, Mém. Soc. Phys. Genève 2: 132. 1824 ["lechenaultiana"].

Herbs, suffrutescent, annual or perennial, 30-100(-150) cm tall. Stems erect or decumbent; young branches densely yel­lowish pubescent. Leaves 3-8 cm, with a slightly raised, or­bicular-discoid gland just below lowest pair of leaflets in upper part of petiole; stipules persistent, linear-subulate, 7-9 mm; ra­chis canaliculate, pubescent; leaflets sessile, 10-25 pairs, linear-falcate, 8-13(-15) × 2-3 mm, very unequally sided, with mid­vein close to upper border of blade. Flowers axillary or in few-flowered, short, axillary or supra-axillary racemes; bracts and bracteoles like stipules but smaller. Sepals ligulate-lanceolate, ca. 1 cm, outside sparsely yellowish pubescent. Petals orange-yellow, slightly longer than or equal to sepals. Stamens 10, sometimes 1-3 reduced. Ovary densely whitish pubescent; stig-ma flat, ciliate. Legume flat, strap-shaped, 2.5-5 × ca. 0.5 cm, with long and short, non-appressed hairs to nearly glabrous. Seeds 8-16, flat, smooth.

Mountains, among shrubs, near roads, grassy slopes. Anhui, Fu­jian, Guangdong, Guangxi, Guizhou, Sichuan, Taiwan, Yunnan [Cam­bodia, India, Indonesia, Laos, Malaysia, Myanmar, New Guinea, Thai­land, Vietnam].