露瓣乌头 lu ban wu tou

Caudex carrot-shaped, ca. 5 cm, ca. 8 mm in diam. Stem to 60 cm, simple, spreading pubescent. Proximal and middle cauline leaves long petiolate; petiole 5--7 cm; leaf blade cordate-orbicular, ca. 4.5 × 6 cm, abaxially glabrous, adaxially sparsely pubescent, 3-sect; central segment rhombic, subpinnately parted, ultimate lobes lanceolate-linear; lateral segments 2-parted nearly to base. Inflorescence to 35 cm, many flowered; rachis spreading pubescent; proximal bracts leaflike. Pedicels 1--3 cm; bracteoles linear-lanceolate. Sepals dark blue, adaxially glabrous; lower sepals oblong, ca. 1.3 cm; lateral sepals ca. 1.5 cm; upper sepal falcate, ca. 5 mm wide, shortly beaked, 1.5--2 cm from base to beak, lower margin suberect. Petals glabrous; claw geniculate at apex; limb exserted; lip slightly concave at apex; spur incurved. Stamens glabrous; filaments entire. Carpels 3, glabrous. Fl. Jul.

* Moist places on mountains; ca. 4400 m. E Xizang.