圆锥乌头 yuan zhui wu tou

Caudex obconical, 2--3 cm. Stem 70--100 cm, apically branched, glabrous. Proximal cauline leaves withered at anthesis; middle ones long petiolate; petiole ca. 6 cm, glabrous; leaf blade cordate-pentagonal, 10--15 × 13--16 cm, abaxially glabrous, adaxially sparsely appressed pubescent, 3-sect; central segment rhombic, apex acuminate, subpinnately parted; lateral segments obliquely flabellate, unequally 2-parted. Inflorescence conical, many flowered; rachis and pedicels spreading pubescent; proximal bracts 3-fid, others linear. Pedicels 3--5.5 cm, with 2 bracteoles near middle; bracteoles narrowly linear, ca. 5 mm. Sepals purple-blue, abaxially sparsely pubescent; lower sepals oblong; lateral sepals broadly obovate; upper sepal high galeate, 1.6--1.8 cm high, lower margin erect or concave. Petals glabrous; lip ca. 4 mm, 2-lobed at apex; spur incurved, slightly circinate at apex, ca. 2.5 mm. Stamens glabrous; filaments entire. Carpels (3--)5, glabrous. Follicles ca. 1.1 cm. Seeds ca. 2 mm. Fl. Aug--Sep.

Forests, forest margins, grassy spoils; 600--1500 m. NE Hebei, E Jilin, SE Liaoning [Korea].