川西淫羊藿 chuan xi yin yang huo

Herbs, 25-60 cm tall. Rhizome moderately long creeping, 2-5 mm in diam. Leaves basal and cauline, bi- or triternate, 9-foliolate or occasionally 5-foliolate; leaflets adaxially green, ovate or suborbicular, 1.5-7.5 × 1-6 cm, papery, abaxially sparsely pubescent or glabrous, adaxially glabrous, both surfaces with conspicuous reticulate veins, base deeply cordate, terminal leaflet with equal rounded lobes, lateral leaflets slightly oblique with outer lobe large and rounded or acute, inner lobe smaller and rounded, margin spinose-serrate, apex rounded or acute. Flowering stem with 3 alternate or rarely opposite leaves, upper biternate or trifoliolate, lower biternate or triternate. Panicle 17-30-flowered, 15-30 cm, sparsely glandular, with lower peduncles 3-5-flowered. Pedicel 1-2 cm, sparsely glandular. Flowers yellow, large, 2.5-3 cm in diam. Outer sepals whitish, ovate, 3-4 × ca. 2 mm, blunt; inner sepals purple, lanceolate, ca. 4 × 1.5 mm, apically acute. Petals yellow, longer than inner sepals; spur horizontally spreading or upwardly curved, ca. 1.5 cm, slender, lamina-less. Stamens slightly prolonged, ca. 3 mm; anthers ca. 2 mm, valved, revolute. Pistil ca. 4 mm. Capsules elongated, 2-2.5 cm, slender; style ca. 8 mm. Fl. May-Jun, fr. Jun-Jul.

● Forests, forest margins, thickets; 2600-3700 m. Sichuan.