革叶淫羊藿 ge ye yin yang huo

Herbs, 30-40 cm tall. Rhizome purplish red, shortly creeping. Leaves basal and cauline, trifoliolate; petiole of basal leaves ca. 20 cm, petiole of cauline leaves 5-6 cm; leaflets adaxially dark green, ovate, 5-7 × 3.5-5 cm, thickly leathery, glabrous, abaxially pilose in axils of veins, adaxially with 5 slightly impressed veins, both surfaces with conspicuous reticulate veins, base deeply cordate with usually rounded lobes, those of lateral leaflets conspicuously unequal, margin spinose-serrate, apex acute or acuminate. Flowering stem with 2 opposite trifoliolate leaves, sometimes 3 or 4 leaves whorled. Panicle 40-45-flowered, 30-35 cm, with lower peduncles 2-20-flowered; rachis glandular pubescent. Pedicel ca. 1.5 cm, slender, glandular pubescent. Flowers yellow. Outer sepals oblong, ca. 5 mm; inner sepals elliptic, ca. 6 mm, apex rounded. Petal spur yellow, horn-shaped, shorter than inner sepals, ca. 4.5 mm. Stamens ca. 3 mm; filaments flat, short. Capsule 1.2-1.5 cm; style rostrate. Seeds 3-5, reniform. Fl. Apr-May, fr. Jun-Jul.

● Forests; ca. 1100 m. Sichuan.