美观糙苏 mei guan cao su

Taproots thick, with numerous woody lateral roots. Rhizomes woody, slender. Stems tufted, 40-60 cm tall, unbranched, erect or ascending, sparsely bristly. Petiole 2.5-21 cm, basal ones persistent; stem leaf blades broadly ovate, 9-15.5 × 6.5-12.2 cm, adaxially sparsely setose, abaxially densely setose, occasionally intermixed with a few stellate hairs, base cordate, margin mucronate dentate-crenate, apex acute to acuminate. Verticillasters 1 or 2, many flowered; floral leaves longer than verticillasters, with petiole 1-1.5 cm, blade 6-10 × 3-5 cm, margin serrate, apex short acuminate; bracts subulate, 6-13 mm, ± spinescent, densely bristly. Calyx tubular, 2-2.5 × ca. 0.9 cm, purplish, glandular puberulent or stellate puberulent, veins hispid outside; teeth double toothed at margin, puberulent, apex emarginate, tufted hairy inside, spines 3-4 mm. Corolla dark purple, to 4.7 cm, tube to 3.3 cm, white or purplish tomentulose on back outside, otherwise glabrous; limb densely white or purplish tomentulose outside, glabrous inside; upper lip to 1.6 cm, margin denticulate, apical half bearded inside; lower lip to 1.7 × 1.6 cm, middle lobe oblate, ca. 7 × 9 mm, constricted at base, margin denticulate, concave; lateral lobes ovate. Filaments long hairy, without appendages. Nutlets glabrous. Fl. Jun-Sep, fr. Jul-Nov.

* Abies forests, grasslands; 3000-3700 m. Sichuan, Yunnan.