长蕊淫羊藿 chang rui yin yang huo

Herbs, ca. 30 cm tall. Rhizome shortly creeping. Leaves basal and cauline, trifoliolate; leaflets adaxially deep green, ovate-lanceolate or lanceolate, to 8 × 3 cm, leathery, abaxially glabrous, base deeply cordate with subequal acute lobes, those of lateral leaflets unequal, acuminate, margin remotely spinose-serrate, apex acuminate. Flowering stem with 2 trifoliolate opposite leaves. Panicle loosely many flowered (to 38-flowered), ca. 15 cm, with lower peduncles 1-2 cm, each 2- or 3-flowered at base of rachis. Pedicel 1-1.5 cm, glabrous. Outer sepals caducous, 2.5-3 mm; inner sepals white, narrowly elliptic, 8-9 × ca. 2.5 mm. Petals reddish purple, cucullate, much shorter than inner sepals, ca. 3 mm, with slight lamina and blunt incurved spur. Stamens conspicuously prolonged, ca. 8 mm; filaments yellowish, 4.5-5 mm; anthers ca. 2.5 mm, valved, revolute. Fruit unknown. Fl. Apr, fr. unknown.

● Habitat unknown, described from plants in cultivation in England; ca. 1400 m. Sichuan (Shizhu).