4. Colutea delavayi Franchet, Pl. Delavay. 158. 1889.
膀胱豆 pang guang dou
Shrubs, deciduous, 1-4 m tall, to 4 cm in diam. Stems with gray-green bark and many fibers, throughout with dense to sparse, pallid and brownish appressed hairs. Leaves pinnate, 19-25-foliolate, ca. 15 cm; stipules linear-lanceolate, 3-4 mm, both surfaces densely pubescent, tapering at apex; leaflets adaxially bottle-green, elliptic, ovate-elliptic, or narrowly obovate, 10-20 × 6-10 mm, abaxially sparsely hairy, adaxially with scattered appressed hairs or subglabrous, base rounded to broadly cuneate, apex rounded or retuse, mucronate. Racemes longer than or equal to leaves, 15-17 cm, 8-14(-31)-flowered. Pedicel 3-5 mm. Calyx tube ca. 3 mm; teeth triangular, 1-1.5 mm, outer and inner margin densely pubescent. Corolla yellowish; standard reflexed, 1-1.3 cm wide, base cordate, apex retuse, stalk 2-3 mm, calluses suborbicular, ca. 1 mm wide; wings ca. 8 mm, auriculate and stipitate at base; keel suborbicular, 6.5-8 mm, broadly triangular auriculate, stalk ca. 7 mm. Ovary flattened, 4-5 mm, outside densely puberulent; stipe ca. 3 mm; style at right angle with ovary, inrolled at apex, adaxially longitudinally barbate; stigma fine. Legume ovoid-fusiform, 3.5-4 × 1.8-2 cm, argute at apex, attenuate at base, stalk 12-18 mm; segments greenish white to yellow-green, outside sparsely appressed blackish brown hairy to glabrous. Seeds brown, not glossy, ca. 4.5 × 3.5 mm; funicle ca. 2 mm. Fl. Aug-Oct, fr. Oct-Dec.
● Mountain slopes, riversides, among shrubs; 1800-3000 m. SW Sichuan (Jiulong, Muli), NW Yunnan.