舌瓣鼠尾草 she ban shu wei cao

Herbs annual. Stems purple-green, erect, 30-40(-70) cm, striate, finely pilose on angles. Petiole 2-3 cm; basal leaf blades oblong, 2-4.5 × 1.2-3 cm, abaxially purple, glabrous, veins pubescent, base cordate, margin crenulate-serrulate, apex obtuse; stem leaves ca. 3-paired, blade lanceolate, 3-7 (-11) × 1-2.2(-4.2) cm. Inflorescences glandular villous; verticillasters 2-12-flowered, widely spaced, in secund, terminal racemes; bracts linear-lanceolate, ca. 5 × 0.5 mm. Pedicel ca. 2.5 mm. Calyx campanulate, ca. 7 mm, villous; upper lip triangular, ca. 2 × 3 mm; lower lip nearly as long as upper, 2-cleft, teeth triangular. Corolla reddish, pilose especially on lips outside; tube conspicuously pilose annulate near base inside, ca. 1.8 cm, gradually dilated upward, to 6 mm wide at throat; upper lip straight, oblong, ca. 4 × 3 mm; lower lip ca. 4.5 × 8 mm, middle lobe ligulate, narrowly elliptic, margin entire, ca. 2 × 1.5 mm; lateral lobes larger than middle, triangular, ca. 2 × 4 mm. Filaments ca. 2 mm; connectives ca. 4.5 mm, upper arms ca. 2.5 mm. Nutlets brown, ellipsoid, ca. 2 × 0.8 mm. Fl. Jun.

* Hillside forests; ca. 800 m. Anhui, Zhejiang.