巴东乌头 ba dong wu tou

Aconitum semigaleatum Pallas ex Reichenbach var. ichangense Finet & Gagnepain, Bull. Soc. Bot. France 51: 511. 1904.

Caudex narrowly obconical, ca. 1.6 cm. Stem 14--30 cm tall, slightly zigzag, branched or simple, spreading pubescent, distally subcorymbose, with 3--5 leaves equally arranged along stem. Basal leaves 1 or 2, and proximal cauline leaves long petiolate; petiole 5--10 cm; leaf blade reniform-pentagonal, 2--2.8 × 4--5.4 cm, 3-parted; central lobe rhombic-obovate, 3-lobed, upper margin obtuse-dentate; lateral lobes obliquely flabellate, unequally 2-fid slightly beyond middle. Flower solitary, terminal; rachis and pedicels spreading pubescent. Pedicels 4--8 cm, distally with 2 bracteoles; bracteoles elliptic, ca. 7 mm. Sepals yellowish, abaxially sparsely pubescent; lower sepals broadly or narrowly elliptic; lateral sepals orbicular-obovate, ca. 1.6 cm; upper sepal navicular or navicular-galeate, beaked, 2--2.3 cm from base to beak. Petals glabrous; limb ca. 7 mm; lip ca. 3 mm; spur incurved, ca. 2 mm. Stamens glabrous; filaments entire. Carpels 3, white pubescent.

* W Hubei.