台湾乌头 tai wan wu tou

Aconitum bartletii Yamamoto var. formosanum (Tamura) T. S. Liu & C. F. Hsieh; A. fukutomei Hayata var. formosanum (Tamura) T. Y. A. Yang & T. C. Huang.

Caudex terete, ca. 3.5 cm, 8--10 mm in diam. Stem ca. 1 m, apically branched, sparsely spreading pubescent, or basally becoming glabrous. Proximal cauline leaves withered at anthesis, middle ones long petiolate or nearly so; petiole 2--4.5 cm; leaf blade pentagonal, 4--6.5 × 7--11 cm, abaxially spreading pubescent at veins, adaxially sparsely appressed pubescent, base cordate, 3-sect or nearly to base; central segment broadly rhombic or rhombic, apex acute, 3-parted; lateral segments unequally 2-parted. Inflorescence 3--5-flowered; rachis retrorse pubescent; basal bracts leaflike, others smaller. Pedicels spreading pubescent, 2.5--5 cm, with 2 bracteoles at middle; bracteoles linear-subulate, 6.5--7 mm. Sepals abaxially sparsely spreading pubescent; lower sepals oblong, ca. 1.3 cm; lateral sepals broadly obovate, 1.4--1.5 cm; upper sepal galeate, ca. 1.5 cm high, lower margin concave. Petals ca. 1.3 cm; claw sparsely pubescent; limb ca. 3.5 mm, sparsely pubescent; spur incurved, subglobose, ca. 1 mm. Stamens sparsely pubescent. Follicles ca. 2 cm. Seeds ca. 3.5 mm. Fl. Jul--Nov.

* Mountains. N Taiwan.