黄毛乌头 huang mao wu tou

Rhizome unknown. Stem 35--65 cm tall, simple, retrorse and spreading yellow hispid, basally with longer spreading hairs. Basal leaves long petiolate; petiole 3--7.5 cm, ± spreading yellow hispid; leaf blade suborbicular or orbicular-reniform, 1.2--3.2 × 2.4--5.4 cm, both surfaces hispid, base deeply cordate, 3-parted; central lobe cuneate-obtrapezoid, 3-lobed, margin dentate; lateral lobes unequally 2-lobed. Cauline leaves 2--4, proximal ones similar to basal leaves, uppermost shortly petiolate. Inflorescence terminal, ca. 11 cm, ca. 12-flowered; rachis and pedicels densely spreading yellow hispid; proximally bracts leaflike, others linear. Pedicels 2--5 mm, each with 2 bracteoles at middle; bracteoles narrowly linear, 2--5 × ca. 0.4 mm. Sepals blue-purple, abaxially spreading yellow pubescent; lower sepals ca. 7 mm; lateral sepals ca. 7.5 mm; upper sepal cylindric-galeate, 9--10 mm high, ca. 3.5 mm in diam., external margin slightly contracted below middle, long beaked, lower margin 8--9 mm. Petals ca. 8 mm, glabrous, ecalcarate; limb ca. 5 mm; lip linear, ca. 3.5 mm. Stamens glabrous; filaments entire. Carpels 3; ovary yellowish villous. Fl. Aug.

* Scrub; 4300--4700 m. SW Sichuan (Daocheng Xian).