滇北乌头 dian bei wu tou

Caudex subglobose or terete, 0.8--2.5 cm, 3.5--5 mm in diam. Stem 10--30 cm tall, simple, basally sparsely retrorse and appressed pubescent or becoming glabrous, apically densely pubescent, 2--5-leaved. Basal leaves ca. 2, and proximal cauline leaves long petiolate; petiole 4--9 cm, sparsely pubescent; leaf blade orbicular-pentagonal, 1.2--2 × 2--3.4 cm, both surfaces sparsely yellow pubescent, 3-parted; central lobe broadly rhombic or flabellate-rhombic, 3-sect; lateral lobes obliquely flabellate, unequally 2-fid ± to middle. Inflorescence 1--4-flowered; rachis and pedicels densely spreading and retrorse yellow pubescent; proximal bracts 3-fid, distal ones subulate, very small. Pedicels suberect upward, 1.2--4 cm, with 2 bracteoles at middle or below; bracteoles linear, ca. 0.8 mm. Sepals yellow, abaxially sparsely yellow pubescent; lateral sepals 1.3--1.5 cm; upper sepal galeate or navicular-galeate, shortly beaked, 1.8--2 cm from base to beak, lower margin suberect or slightly concave. Petals glabrous; limb ca. 8 mm; lip slightly concave; spur 1.2--2.5 mm, spreading backward. Stamens glabrous; filaments entire or 2-denticulate. Carpels 3 or 5, densely yellow villous. Fl. Aug--Oct.

* Grassy slopes; 3700--3800 m. NE Yunnan.