白花铃子香 bai hua ling zi xiang

Shrubs 0.5-2 m tall. Stems gray-brown, bark peeling longitudinally; branches brown, puberulent, glabrescent. Leaves often in whorls of 3; petiole ca. 2 mm, puberulent; leaf blade lanceolate, 3.5-6 × 0.8-1.3 cm, sparsely puberulent, adaxially glandular, abaxially pubescent along veins otherwise glandular, base subrounded to broadly cuneate, margin serrulate, apex acuminate. Cymes 1(-3)-flowered; peduncle ca. 3 mm; bracteoles linear, 5-7 × 0.5 mm. Pedicel 1-2 mm. Calyx campanulate, 2-6 cm, pubescent, glandular outside, glabrous inside; teeth 5, narrowly triangular, to 8 mm, apex spinescent. Corolla white, 1.5-2 cm, puberulent outside, glabrous inside; upper lip ovate, ca. 7 mm; lower lip ca. 1.3 cm, middle lobe cordate, emarginate, lateral lobes ovate. Filaments puberulent, apex ± dentate. Style unequally 2-cleft. Fl. Aug.

* Wet thickets; 3400-3700 m. Sichuan, Xizang.