22. Epimedium latisepalum Stearn, Bot. Mag. (Kew Mag.). 10: 180. 1993.
宽萼淫羊藿 kuan e yin yang huo
Herbs, ca. 30 cm tall. Rhizome creeping, slender. Leaves basal and cauline, trifoliolate; petiole to 10 cm; leaflets adaxially deep green, narrowly ovate, 6-9 × 2.5-4 cm, leathery, abaxially glaucous, with short erect scattered hairs, adaxially glabrous, base deeply cordate with lobes acute or rounded and touching or slightly overlapping, those of lateral leaflets unequal, margin spinulose-subserrulate, apex shortly acuminate or acute. Flowering stem with 2 trifoliolate opposite leaves. Inflorescence simple, racemose, loose, few flowered (ca. 8-flowered), ca. 20 cm. Pedicel 2.5-5 cm, glabrous. Flowers pendulous, large, 4-5 cm in diam. Outer sepals caducous, green, oblong, 3-5 mm, margin emarginate or repand; inner sepals spreading horizontally, white, elliptic, ca. 16 × 8-9 mm, apically shortly acuminate. Petals white but slightly yellowish or purplish tinged at base, much longer than inner sepals; spur slightly curved, horn-shaped, elongated, ca. 2.5 cm, basally expanded into lamina ca. 7 mm. Stamens included, ca. 4 mm; anthers yellow, ca. 2.5 mm, valved, apex blunt. Pistil ca. 7 mm; style ca. 3.5 mm. Fl. and fr. unknown.
● About 900 m. Sichuan (Baoxing).
Epimedium latisepalum was described from plants cultivated in the Royal Botanic Gardens, Kew, but originally from Sichuan.