乾宁乌头 qian ning wu tou

Caudex narrowly obconical, ca. 5 cm. Stem 1--1.8 m, branched, retrorse pubescent, with leaves equally arranged along stem. Middle cauline leaves slightly long petiolate, petiole 3--5 cm; leaf blade orbicular-pentagonal, ca. 8 × 9 cm, abaxially pubescent at veins, adaxially sparsely retrorse pubescent, 3-sect; central segment rhombic, apex acuminate, pinnately parted, ultimate lobes narrowly lanceolate or lanceolate-linear; lateral segments obliquely flabellate, unequally 2-parted nearly to base. Inflorescence terminal, 5--8-flowered; rachis and pedicels densely retrorse and appressed pubescent or spreading pubescent; proximal bracts leaflike. Pedicels 1.2--2.5 cm, with 2 bracteoles at middle or above; bracteoles subulate, 4--10 mm, sometimes leaflike. Sepals blue-purple, abaxially sparsely pubescent or subglabrous; lower sepals oblong; lateral sepals orbicular-obovate, 1.3--1.6 cm; upper sepal high galeate, 1.6--2 cm high, shortly beaked, lower margin slightly concave, 1.4--1.8 cm. Petals ca. 1.8 cm; claw and lip sparsely pubescent; limb glabrous or sparsely pubescent, ca. 9 mm; lip ca. 5 mm, slightly concave at apex; spur incurved, ca. 2 mm. Stamens glabrous; filaments entire. Carpels 3, glabrous. Fl. Aug.

* Quercus scrub, mountains, by streams; 3000--3900 m. W Sichuan, SE Xizang.