新都桥乌头 xin du qiao wu tou

Caudex carrot-shaped, ca. 3 cm, 4--6 mm in diam. Stem 36--120 cm tall, sparsely retrorse pubescent. Proximal cauline leaves withered at anthesis, middle ones slightly long petiolate; petiole 1--10.5 cm, sparsely retrorse pubescent; leaf blade pentagonal, ca. 5.5 × 8 cm, both surfaces appressed puberulent or abaxially glabrous, base cordate, 3-sect; central segment ovate-rhombic, apex acuminate, subpinnately parted; ultimate lobes linear or linear-lanceolate, 2--2.8 mm wide; lateral segments obliquely flabellate, unequally 2-parted nearly to base. Inflorescence to 25 cm, 10--13-flowered; rachis and pedicels retrorse pubescent, or spreading pubescent; bracts usually leaflike. Pedicels 0.7--4 cm, with 2 bracteoles at middle; proximal bracteoles leaflike, others narrowly linear or subulate, 3--5 mm. Sepals violet-blue, abaxially glabrous or sparsely pubescent; lower sepals narrowly elliptic; lateral sepals 1--1.5 cm; upper sepal falcate, ca. 5 mm wide, 1.5--2.3 cm from base to beak, lower margin slightly concave. Petaline claw densely pubescent, apex usually geniculate; limb ca. 6 mm; lip ca. 3.5 mm, slightly concave; spur 1--1.5 cm. Stamens glabrous; filaments entire. Carpels 3, appressed pubescent. Fl. Jul--Aug.

* Grassy slopes, alpine meadows; 3800--4600 m. SW and W Sichuan, E Xizang, NW Yunnan.