白虫豆 bai chong dou

Atylosia nivea Wallich ex Bentham in Miquel, Pl. Jungh. 243. 1852; Cantharospermum niveum (Wallich ex Bentham) Raizada.

Subshrubs, erect, ca. 1 m tall. Stems pubescent. Leaves pinnately 3-foliolate; stipules small, deciduous; petiole 1.5-3 cm, densely tomentose; stipels absent; petiolules 2-5 mm, densely tomentose; leaflets leathery, with glandular spot below; terminal leaflet obovate, 2.5-3.8 cm, adaxial surface pubescent, basal veins 3, lateral veins 3-5 on each side, slightly obvious on both surfaces; lateral leaflets slightly smaller, obliquely elliptic, with black spot after drying adaxially, with fine downy hairs on abaxial surface. Raceme axillary, 3-6 cm, with a few flowers; peduncle 0.6-1.2 cm; bracts ovate. Calyx campanulate; lobes triangular, shorter than tube. Corolla yellow, 4-5 × as long as calyx; standard obovate, base auriculate; wings auriculate; keels with auricles, apex slightly inflexed. Ovary densely hairy. Leg­ume obovate-elliptic, compressed, 3-4.5 cm, to 1.5 cm wide near top, densely pubescent, legume valve with obvious trans­verse constriction between seeds, apex with curved beak. Seeds 4-8, with light gray spot, ellipsoidal, ca. 5 × 4 mm, apex rounded; strophiole succulent at base. Fl. and fr. Aug-Oct.

Sunny slopes of rocky mountains; 400-1200 m. Yunnan [Myan­mar].