显脉乌头 xian mai wu tou

Caudex obconical, 3.5--4 cm. Stem basally erect, apically twining, 1--2 m, ca. 7 mm in diam., branched, retrorse and appressed pubescent. Petiole 1--2.2 cm; leaf blade cordate-pentagonal, ca. 6 × 7.5 cm, papery, abaxially sparsely pubescent at veins, adaxially appressed pubescent with convex veins, base cordate, 3-parted; central lobe rhombic, apex long acuminate, subpinnately lobed; lateral lobes unequally 2-fid nearly to middle. Inflorescence 1.5--4 cm, 2--4-flowered; rachis sparsely retrorse pubescent; bracts linear, ca. 7 mm, proximal ones leaflike. Pedicels 1.2--2.5 cm, glabrous or subglabrous, proximally with 2 bracteoles; bracteoles linear, 3--4 mm. Sepals purple-blue, abaxially glabrous; lower sepals oblong or linear-lanceolate, 1.1--1.3 cm; lateral sepals obliquely broadly obovate, 1.3--1.6 × ca. 1.3 cm; upper sepal galeate, 1.6--1.9 cm high, beak indistinct, lower margin 1.5--1.8 cm. Petals ca. 1.5 cm; claw pilose; lip ca. 4 mm, 2-lobed at apex, glabrous; spur circinate, ca. 4 mm, glabrous. Stamens glabrous; filaments entire. Carpels 5, glabrous.

* Grasslands. SW Sichuan (Muli Zang Zu Zizhixian).