波密乌头 bo mi wu tou

Caudex unknown. Stem branched, spreading yellowish pubescent. Distal leaves shortly petiolate; petiole ca. 1 cm, spreading pubescent; leaf blade ovate-pentagonal, ca. 4 × 4 cm, abaxially glabrous, adaxially sparsely pubescent at veins, base cordate, 3-parted; central lobe rhombic, 3-fid to middle, subpinnatilobate; lateral lobes obliquely flabellate, unequally 2-parted slightly beyond middle. Inflorescence terminal, ca. 15 cm, 6-flowered; rachis sparsely spreading yellow pubescent; bracts leaflike. Pedicels 4--6.5 cm, oblique upward, glabrous, with 2 bracteoles at middle; bracteoles leaflike, sessile, 1.2--2 × 1--2 cm. Sepals blue-purple, abaxially glabrous; lower sepals elliptic or obovate, 1.3--1.4 × 6.5--8 mm; lateral sepals obliquely broadly obovate, 1.5--1.7 × 1.5--1.6 cm; upper sepal navicular, shortly beaked. Petals curved, ca. 2.6 cm, glabrous; claw slightly geniculate at apex; limb ca. 1.2 cm × 3.8 mm; lip ca. 4 mm, slightly concave at apex; spur incurved, ca. 2 mm. Stamens glabrous; filaments 2-denticulate distally. Carpels 5, glabrous. Fl. Aug.

* Alpine grasslands; ca. 4000 m. E Xizang (Bomi Xian).