木鱼坪淫羊藿 mu yu ping yin yang huo

Herbs, 20-60 cm tall. Rhizome compact, ca. 7 mm in diam. Leaves basal and cauline, trifoliolate, leathery; basal petioles 4-10 cm; leaflets abaxially occasionally reddish tinged, adaxially shiny, narrowly ovate, 9-14 × 6-7 cm, abaxially glaucous, with extremely minutely appressed hairs, adaxially glabrous, base deeply cordate with a narrow sinus, lobes of terminal leaflet equal and obtuse or acute, those of lateral leaflets unequal with inner lobe smaller and acute or obtuse, outer lobe much longer and acuminate, margin closely spinose-serrate, apex acute or acuminate. Flowering stem with 2 trifoliolate opposite leaves or 3 whorled leaves. Inflorescence simple, 14-25-flowered, 15-30 cm. Pedicel 1-3 cm, glandular hairy. Flowers large, ca. 4.5 cm in diam. Outer sepals caducous, green, to 5 mm; inner sepals pale yellow, narrowly ovate, ca. 10 × 4-5 mm, apically acuminate. Petals pale sulfur-yellow, much longer than inner sepals; spur much curved, subulate, elongate, ca. 2 cm, lamina-less. Stamens exposed, ca. 4.5 mm; filaments pale yellow, ca. 2 mm; anthers pale yellow, valved. Pistil ca. 5 mm. Fruit unknown. Fl. Apr, fr. unknown.

● Forests; ca. 1200 m. Guizhou, Hubei.