太白乌头 tai bai wu tou

Caudex obovate-globose or carrot-shaped, 1.5--3 cm. Stem 35--60 cm tall, apically branched, apically retrorse and appressed pubescent, with leaves equally arranged along stem. Proximal cauline leaves withered at anthesis; middle ones long petiolate; petiole ca. 22 cm, retrorse pubescent; leaf blade 3.5--5.5 × 5--7 cm, both surfaces sparsely pubescent, 3-parted; central lobe broadly rhombic, subpinnately lobed; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence terminal, 2--4-flowered; rachis and pedicels retrorse pubescent; bracts 3-fid or oblong. Pedicel suberect upward, decurved at apex, 1.5--2.5 cm, with 2 bracteoles at middle; bracteoles linear, 0.6--1.1 × ca. 0.5 mm. Sepals blue; lower sepals ca. 1.1 cm; lateral sepals ca. 1.2 cm; upper sepal galeate, ca. 1.7 cm high, adaxially glabrous, indistinctly clawed, shortly beaked, ca. 1.5 cm from base to beak, lower margin slightly concave. Petals glabrous; limb ca. 8 mm; lip ca. 3.5 mm; spur incurved, ca. 1 mm. Stamens glabrous; filaments 2-denticulate. Carpels 5, glabrous or sparsely pubescent. Follicles ca. 8 mm. Fl. Sep.

* Alpine grasslands; 2600--3400 m. W Henan, S Shaanxi.