Thesium longiflorum Hand.-Mazz.

Herbs perennial; rhizomes slender, 8-13 cm, 2-2.5 mm thick, sparsely scaly. Stems patent and ascending, often branched at base, to 15 cm, striate. Leaves dense, linear or sometimes lanceolate, 7-17 × 1-2.5 mm, 3-veined, margin rugose. Inflorescences racemelike, often branched, with 1 flower per axil; bracts inserted at base of pedicels and adnate to peduncles, linear-lanceolate, ca. 25 × 2 mm, 1-veined; pedicel usually slender, 11-13 mm; bracteoles 2, linear, 6-7 mm, usually incurved. Perianth yellowish white, 6-10 mm, tube tubular, usually divided to middle, lobes oblong-linear, to 5.5 mm, apex acute, incurved. Stamens and style not exserted. Ovary stalk ca. 2 mm. Nutlet globose, 4.5 mm in diam., with 10 longitudinal veins, usually with ± parallel lateral veins; persistent perianth longer than fruit; fruiting pedicel 13-15 mm. Fl. Jun-Jul, fr. Aug-Sep.

Qinghai, Sichuan, Xizang, Yunnan.

* Sunny grassy slopes, dry open forests; 2600-4100 m.

Thesium himalense var. pachyrhizum J. D. Hooker.