长齿乌头 chang chi wu tou

Caudex ellipsoid-globose, ca. 1.5 cm. Stem ca. 1 m tall, apically shortly branched, glabrous. Proximal and middle cauline leaves long petiolate; petiole ca. 6 cm; leaf blade cordate-pentagonal, ca. 5.8 × 8 cm, abaxially glabrous, adaxially sparsely retrorse pubescent, 3-parted; central lobe rhombic, subpinnately parted, apex acuminate; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence terminal, 5--7-flowered; rachis and pedicels glabrous; proximal bracts leaflike, others linear. Pedicels slightly curved, to 3 cm, with 2 bracteoles at middle or below; bracteoles nearly subulate, ca. 5 mm. Sepals blue-purple, abaxially glabrous; lower sepals ovate or sublanceolate; lateral sepals orbicular-obovate, ca. 1.8 cm; upper sepal high galeate, 2--2.5 cm high, lower margin oblique upward, ca. 2 cm. Petals glabrous; lip ca. 7 mm, 2-lobed at apex; spur backward subcircinate, ca. 4 mm. Stamens glabrous; filaments entire. Carpels 3, glabrous. Fl. Aug.

* Mountains; ca. 2800 m. W Hubei.