锐裂乌头 rui lie wu tou

Caudex obconical, 3--4.5 cm, 1.2--1.6 cm in diam. Stem 20--80 cm tall, simple, basally glabrous, apically sparsely retrorse pubescent, with leaves equally arranged along stem. Proximal cauline leaves withered at anthesis, middle ones slightly long petiolate; petiole 2--3 cm; leaf blade pentagonal, 3--9 × 4--10 cm, both surfaces appressed pubescent at veins, base cordate, 3-sect; central segment rhombic, apex acuminate; lateral segments obliquely flabellate, unequally 2-parted. Inflorescence corymbose, 3--7-flowered; rachis and pedicels retrorse pubescent; proximal bracts leaflike. Pedicels 2--3 cm, with 2 bracteoles below middle; bracteoles linear, 2--6 mm, retrorse pubescent. Sepals abaxially pubescent; lower sepals 1--1.5 cm; lateral sepals 1.2--1.7 cm; upper sepal high galeate, 1.4--2.4 cm high, 1.3--1.9 cm from base to beak, lower margin slightly concave. Petals pubescent; limb 6.5--12 mm; spur incurved. Stamens pubescent; filaments 2-denticulate. Carpels 3, glabrous or sparsely pubescent. Follicles 0.7--1.1 cm. Fl. Aug.

* Mountains. S Taiwan.