暗紫鼠尾草 an zi shu wei cao

Plants perennial. Stem 1, erect, ca. 50 cm, brown, brownish villous, glabrescent toward base. Petiole of lower stem leaves longest, 12-15 cm, 5-10 mm in upper leaves; leaf blade ovate to broadly ovate, 3.5-10.5 × 2.5-9 cm, finely corrugate, adaxially densely pubescent, abaxially densely gray cobwebby-tomentose, base shallowly cordate, margin double crenate, apex obtuse to acute. Inflorescences densely brown villous, glandular pilose; verticillasters 2-6-flowered, remote basally, crowded apically, in terminal racemes or panicles 6-15 cm; bracts ovate, 0.6-1.5 cm × 4-10 mm. Pedicel 3-4 mm. Calyx campanulate, 1.3-1.5 cm, densely spreading villous on veins, 2-lipped to ca. 1/3 its length; upper lip broadly triangular, ca. 6 × 8.5 mm; lower lip subequal upper, teeth triangular, apex acute. Corolla dark purple, 2.5-3 cm, pilose, pilose annulate inside; tube straight, slightly dilated apically, to 1 cm wide at mouth; upper lip straight, slightly concave, ca. 7.5 × 7-7.5 mm; middle lobe of lower lip obcordate, ca. 5 × 8.5 mm. Filaments ca. 5.5 mm; connectives ca. 8 mm, arms subequal. Nutlets unknown. Fl. Jul.

* Grassy slopes; ca. 3400 m. Yunnan

Only differing from the previous species in indumentum characters.