雷波乌头 lei bo wu tou

Caudex carrot-shaped, ca. 6 cm, ca. 5 cm in diam. Stem ca. 1 m tall, simple or 1-branched below inflorescence, basally becoming glabrous, apically sparsely retrorse pubescent, ca. 15-leaved. Proximal cauline leaves withered at anthesis, and middle ones long petiolate; petiole 6--15 cm, nearly glabrous; leaf blade orbicular or orbicular-pentagonal, 4.6--6.4 × 7.2--9 cm, both surfaces nearly glabrous, 3-sect; central segment broadly rhombic, ultimate lobes linear-ovate or linear-lanceolate, 3.6--5.5 mm wide, margin entire or with 1 or 2 teeth, apex rounded or blunt, indistinctly shortly acute; lateral segments obliquely flabellate, unequally 2-parted. Inflorescence ca. 30 cm, 8--12 flowered; rachis and pedicels retrorse and appressed pubescent; bracts leaflike, most distal ones obovate. Pedicels 3--8 cm, distally with 2 bracteoles; bracteoles obovate or broadly elliptic, 0.8--1.3 cm × 3--5 mm. Sepals blue, abaxially sparsely appressed pubescent; lower sepals ca. 1.4 cm; lateral sepals 1.6--1.8 cm; upper sepal galeate or navicular-galeate, shortly beaked, lower margin 2.1--2.5 cm. Petals glabrous; claw ca. 1.7 cm, upper part curved; limb ca. 8 × 3 mm, ecalcarate; lip ca. 4 mm. Stamens pubescent; filaments entire or 2-denticulate. Carpels 5, densely appressed pubescent. Fl. Sep.

* Forests; ca. 3800 m. Sichuan (Leibo Xian).