滇川乌头 dian chuan wu tou

Rhizome unknown. Stem 60--75 cm tall, usually simple, pilose. Basal leaves and proximal cauline leaves long petiolate; petiole to 24 cm; leaf blade reniform-pentagonal, 7--15 × 10--20 cm, palmately 5--7-parted or 3-sect; segment rhombic, 3-fid, sharply dentate, abaxially sparsely pubescent at veins, adaxially appressed pubescent. Inflorescence to 25 cm, many flowered; rachis and pedicels spreading pubescent; proximal bracts leaflike, others linear. Pedicels 1--4 cm, with 2 bracteoles below middle of pedicels. Sepals violet, sometimes yellow-white, abaxially sparsely pubescent; lower sepals 8--10 cm; lateral sepals obliquely broadly obovate, 1--1.2 cm; upper sepal cylindric, 2--2.5 cm high, ca. 3.5 mm in diam. at middle, with a beak, lower margin ca. 1.2 cm. Petals glabrous; lip linear, ca. 5 mm; spur circinate, longer than lip. Stamens glabrous; filaments entire. Carpels 3, glabrous or ovary pilose.

* Mountains, Abies forests; 3700--4500 m. W Sichuan, NW Yunnan (Dêqên Xian, Zhongdian Xian).