长萼糙苏 chang e cao su

Stems shiny, very sparsely stellate pubescent, much branched. Stem leaf blades ovate, 13-15 × 9-11 cm, adaxially sparsely hispidulous, stellate and hairs with longer central arms, abaxially sparsely stellate pubescent, base shallowly oblique cordate, margin dentate, apex caudate-acuminate. Verticillasters numerous, 4-16-flowered, widely spaced; peduncle 2-5 mm; rachis distinctly branched; bracts needlelike, 2-6(-10) mm. Calyx tubular, ca. 1.5 × 6 mm, dusty stellate puberulent outside, veins sparsely bristly; lobes double toothed, spines 3-4 mm, marginal teeth tufted hairy inside. Corolla ca. 2.5 cm; tube ca. 1.7 cm, glabrous except for sparsely villous back outside, pilose annulate inside; upper lip ca. 8 mm, margin denticulate, very densely villous outside, bearded inside; lower lip densely villous except for glabrous margin outside, ca. 8 × 8 mm; lobes ovate, middle lobe ca. 5 × 3 mm. Stamens included; filaments hairy, posterior 2 with a slender, short-spurred basal appendage. Nutlets glabrous. Fr. Oct.

* Bamboo forests; ca. 3700 m. Yunnan.