长柱乌头 chang zhu wu tou

Caudex carrot-shaped, ca. 7 cm, ca. 7 mm in diam. Stem ca. 1 m tall, basally densely retrorse and spreading pubescent, apically glabrous. Proximal cauline leaves withered at anthesis; middle ones long petiolate; petiole 5--9 cm, nearly glabrous; leaf blade cordate-pentagonal, 7--8.2 × 11--12 cm, both surfaces sparsely pubescent at veins, 3-parted; central lobe cuneate-rhombic, 3-lobed; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence ca. 6 cm, ca. 6-flowered; rachis distally and pedicels densely white spreading pubescent; bracts usually leaflike. Pedicels 1--3 cm, oblique upward, with 2 bracteoles at middle; bracteoles subulate, ca. 5 mm. Sepals blue-purple, abaxially glabrous; lower sepals narrowly oblong or linear, ca. 9 mm; lateral sepals obliquely broadly obovate, ca. 1.7 cm; upper sepal navicular-galeate, long clawed (claw ca. 9 mm), beak ca. 5 mm, ca. 2.5 cm from base to beak, lower margin concave. Petals glabrous. Stamens glabrous; filaments entire. Carpels 4, glabrous, style ca. 4 mm, ca. 3.2 mm. Fl. Aug.

* NW Yunnan (Dêqên Xian).