粗筒兔耳草 cu tong tu er cao

Herbs, 6-15 cm tall. Lateral roots ca. 6 cm; root crown without persistent leaf sheaths. Rhizomes ca. 3 cm, 6-10 mm in diam. Stems 1 or few, erect to decumbent, longer than leaves. Basal leaves 3-7; petiole 2.5-4.5 cm, base sheathlike; leaf blade elliptic to oblong-elliptic, 2-4 cm, margin usually coarsely double serrate. Stem leaves 3-5, sessile or short petiolate; leaf blade ovate to broadly so, much smaller than basal leaves, margin sharply toothed. Spikes 2-3.5 cm; bracts ovate, 6-8 mm, margin incised-serrate. Calyx ca. 5 mm; lobes lanceolate, ca. 1.2 mm, primary veins 2, reaching lobe apex. Corolla white or pale blue, ca. 7 mm; tube ca. 4 mm, slightly longer than limb, curved, inside hairy; lower lip as long as upper, 2-lobed, narrow; upper lip 2-lobed, lobes linear, ca. 3 X 0.7 mm. Style slightly exserted; stigma capitate. Fl. Aug.

* Mountain slopes; 4500-4600 m. S to SE Xizang.