Colquhounia seguinii Vaniot

Shrubs ca. 2 m tall. Stems glabrous or pubescent; branches densely puberulent; branchlets 5-10 cm. Petiole 1-3(-4.5) cm, nearly as long as blade in basal leaves, shorter in upper leaves; leaf blade ovate-oblong, 2.5-4(-11) × 1-2(-5.5) cm, adaxially dark green, sparsely strigose to densely villous, abaxially pubescent to villous mainly along midrib and veins, base broadly cuneate or rounded, margin serrulate, apex acuminate. Inflorescences capitate, 3-4 cm; verticillasters 2-6-flowered; floral leaves ovate, 1-1.5 cm. Pedicel 2-3 mm. Calyx ca. 5 mm, densely puberulent; teeth triangular, ca. 2 mm. Corolla yellow to purple, ca. 2 cm, finely pubescent, glandular outside; tube ca. 1.2 cm; upper lip oblong, ca. 8 mm, apex rounded; lateral lobes of lower lip largest, ovate. Nutlets triquetrous, ovoid.

Guangxi, Guizhou, Hubei, Sichuan, Yunnan [Myanmar].

Thickets, streamsides; 200-2700 m.