理县乌头 li xian wu tou

Caudex narrowly obconical or carrot-shaped, 4--7 cm. Stem 50--100 cm tall, simple or apically branched, glabrous, with many leaves equally arranged along stem. Proximal cauline leaves withered at anthesis; middle ones long petiolate; petiole 8--12 cm; leaf blade orbicular-pentagonal, 4--6.8 × 5.5--8 cm, both surfaces sparsely pubescent at veins, base deeply cordate, 3-parted; central lobe rhombic; lateral lobes obliquely flabellate, unequally 3-parted. Inflorescence terminal, 6--24 cm, 6--20-flowered; rachis glabrous; proximal bracts leaflike, others oblong-linear. Pedicels 2--6.4 cm, sparsely spreading pubescent, with 2 bracteoles at middle or above; bracteoles oblong-linear to linear, 0.8--1.5 cm × 0.5--3 mm. Sepals dark blue, abaxially glabrous or subglabrous, margin sparsely pubescent; lateral sepals obliquely obovate, ca. 0.9 cm; upper sepal navicular-galeate, 1.4--1.5 cm, shortly beaked, 1.4--1.5 cm from base to beak, lower margin concave. Petals glabrous; claw sometimes slightly geniculate at apex; limb 5--7 mm; lip ca. 2.5 mm; spur subglobose, 1--1.5 mm. Stamens 6--7 mm, glabrous; filaments entire. Carpels 5(or 6), spreading pubescent. Fl. Jul.

* Forests; ca. 3300 m. NC Sichuan (Li Xian).