白狼乌头 bai lang wu tou

Caudex conical. Stem erect, 80--150 cm tall, usually sparsely appressed and retrorse pubescent. Proximal cauline leaves withered at anthesis, and distal ones with petiole 1--7 cm; leaf blade pentagonal, 7--10 × 8--12 cm, abaxially glabrous, adaxially retrorse pubescent, palmately 3-sect; central segment rhombic, apex acuminate, pinnately parted; lateral segments obliquely flabellate, unequally 2-parted. Flower solitary; rachis and pedicels sparsely appressed and retrorse pubescent. Pedicel upward curved, 3--11 cm, distally with 2 bracteoles; bracteoles 0.8--1.5 cm. Sepals blue-purple, abaxially pubescent; lower sepals ovate-oblong, 1.2--1.7 cm; lateral sepals suborbicular, 1.3--1.8 × 1.3--1.8 cm; upper sepal high galeate, 1.5--2.2 cm high. Petals glabrous; limb 3--4 mm wide; lip ca. 4 mm, 2-lobed at apex; spur decurved, ca. 2 mm. Stamens glabrous; filaments entire or 1- or 2-denticulate. Carpels 5, glabrous. Fl. Jul--Aug.

* Grasslands. Nei Mongol (Hinggan Meng).