外折糖芥 wai zhe tang jie

Herbs perennial, 2-10(-15) cm tall. Trichomes malpighiaceous throughout, rarely 3-fid ones on leaves. Stems decumbent or erect, often more than 1 from caudex. Basal leaves rosulate; petiole 4-10(-20) mm, often persistent; leaf blade linear-lanceolate or oblong, (1-)1.5-4(-6) cm × 1-4(-7) mm, base attenuate, margin entire or denticulate, apex acute. Cauline leaves few or absent, subsessile. Racemes corymbose, densely flowered, ebracteate, elongated and often deflexed in fruit. Fruiting pedicels divaricate, (2-)4-7(-8) mm, stout, narrower than fruit. Sepals linear-oblong, 4-6 × 1-1.5 mm, lateral pair saccate at base. Petals yellow, spatulate or obovate, 6-10(-12) × 2-4 mm, apex rounded; claw subequaling sepals. Filaments yellow, 4-6.5 mm; anthers linear-oblong, 1.5-2 mm. Ovules 40-50 per ovary. Fruit narrowly linear, subterete, (2.5-)3-5 cm × 1-1.5 mm, torulose, divaricate or ascending, straight or curved; valves pubescent outside with malpighiaceous and rarely 3-forked trichomes, glabrous inside; style stout, 1-3 mm, cylindric, sparsely pubescent; stigma entire or slightly 2-lobed. Seeds oblong, 1.2-1.5(-1.9) × 0.7-1 mm. May-Jul, fr. Jul-Aug.

Gravelly areas, slope; 3700-5200 m. SW Xinjiang (Taxkorgan Tajik Zizhixian), Xizang [India, Sikkim].

The above first record from Xinjiang is based on Northwest Plateau Institute Team 3266 (PE).