四川小野芝麻 si chuan xiao ye zhi ma

Herbs perennial. Stems 8-10 cm tall, base with slender stolons, bristly. Petiole 1.5-3.2 cm; leaf blade rhombic-ovate, 1.7-4.2 × 1.1-3 cm, base broadly cuneate, margin coarsely serrate, apex obtuse, veins sparsely appressed pilose. Verticillasters 2-4-flowered; bracts minute. Calyx tubular-campanulate, 7-8 × 2 mm, sparsely bristly; teeth triangular-lanceolate, awned. Corolla purple-red(?), ca. 1.6 cm, glabrous except for sparsely pilose upper lip outside; tube ca. 1.2 mm wide, to 5 mm wide at throat; upper lip straight, suboblong, ca. 6.5 mm, apex truncate, emarginate; lower lip ca. 6 × 7 mm, middle lobe circular-obovate, lateral lobes subcircular. Ovary lobes subglobose, glabrous. Nutlets unknown. Fl. Apr-May.

* Bamboo forests along streams; ca. 600 m. Sichuan.