等唇玄参 deng chun xuan shen

Herbs, slender, to 20 cm tall, unbranched. Rhizomes slender, sometimes with small globose nodules. Stems hollow, narrowly winged, striate. Leaves on lower nodes scalelike, otherwise leaf blade broadly ovate, 0.2-3 cm, adaxially glabrous or sparsely pubescent, base truncate to subcordate, margin with few irregular large teeth or double toothed. Cymes mostly from upper leaf axils, 1-flowered, rarely 2-flowered. Pedicel slender, more than 2.5 cm, puberulent to subglabrous. Calyx ca. 3 mm; lobes ovate-oblong, apex subobtuse to acute. Corolla white, subcampanulate, ca. 8 mm; lower lip lobes narrow; upper lip almost as long as lower lip, lobes broadly rounded, with overlapping margins. Stamens slightly longer than corolla tube; staminode small, narrowly spatulate. Ovary 1.5-2 mm. Style 5-6 mm. Fruit unknown. Fl. Jun-Jul.

* Forests; 3300-3900 m. W Sichuan.