12. Epimedium myrianthum Stearn, Kew Bull. 53: 218. 1998.
天平山淫羊藿 tian ping shan yin yang huo
Epimedium sagittatum (Siebold & Zuccarini) Maximowicz subsp. pyramidale (Franchet) Stearn; E. sagittatum var. pyramidale (Franchet) Stearn; E. sinense Siebold ex Miquel var. pyramidale Franchet.
Herbs, 30-60 cm tall. Rhizome short, stout, with numerous fibrous roots. Leaves basal and cauline, leathery, trifoliolate; leaflets of basal leaves mostly ovate, 5-6 × 3-4 cm, apex acute; leaflets of cauline leaves adaxially shiny, mostly narrowly ovate, sometimes elliptic or lanceolate, 6-11 × 2-6 cm, abaxially glaucous, with extremely minute appressed hairs, adaxially glabrous, base moderately cordate, apex long acuminate, lobes of terminal leaflet rounded, those of lateral leaflets unequal with lobes rounded or acute, margin flat, closely spinulose-serrate. Flowering stem with 2 opposite, or sometimes 3 or 4 whorled, long petiolate leaves. Inflorescence paniculate, loosely 70-210-flowered, 18-34 × 7-9 cm, glabrous. Pedicel 5-15 mm. Flowers minute. Outer sepals black, obtuse, unequal in length, one pair ca. 2 mm, other pair ca. 3.5 mm; inner sepals white, narrowly ovate, ca. 4 × 1.5-2 mm, apically acute. Petals orange-yellow and red, slipper-shaped, shorter than inner sepals, 2-2.5 mm, apically obtuse. Stamens exposed, pale yellow, ca. 4 mm; filaments ca. 2 mm; anthers ca. as long as filaments. Pistil ca. 5.2 mm; style ca. 2.8 mm. Fruit unknown. Fl. Apr-Jul, fr. unknown.
● Dense forests, thickets, roadsides, streamsides; 700-1500 m. Guangxi, Hubei, Hunan.