薄叶乌头 bao ye wu tou

Caudex conical. Stem erect or apically slightly curved, 1--1.6 m tall, simple or apically branched, retrorse pubescent, or glabrous, with 12--18 leaves equally arranged along stem. Proximal cauline leaves withered at anthesis, long petiolate; petiole 6.5--9 cm, retrorse pubescent; leaf blade subpentagonal, 8--12 × 12--15 cm, abaxially sparsely curved pubescent, adaxially becoming glabrous, 3-parted; central lobe rhombic, apex acuminate; lateral lobes unequally 2-parted. Inflorescence: terminal 4--6-flowered, axillary 2- or 3-flowered; rachis and pedicels slightly pubescent, glabrous or nearly so; bracts leaflike. Pedicels 1--3 cm, sparsely retrorse pubescent, sometimes glabrescent, with 2 bracteoles at middle; bracteole narrowly linear, 2.5--4 mm. Sepals purplish blue, abaxially glabrous or nearly so; lower sepals 8--11 mm; lateral sepals 1--2 cm; upper sepal high galeate, 1.4--2.5 cm high, shortly beaked, lower margin 1.2--2 cm. Petals glabrous; limb ca. 8 mm; lip ca. 4.5 mm, 2-lobed at apex; spur slightly circinate, ca. 2 mm. Stamens glabrous, rarely pubescent; filaments entire. Carpels 3, along ventral suture pubescent. Follicles ca. 1.4 cm, glabrous. Seeds ca. 2.5 mm. Fl. Aug.

Forests, grasslands, grassy slopes; 400--800 m. Heilongjiang, Jilin [Korea, Russia (Far East)].