大齿黄芩 da chi huang qin

Herbs perennial. Rhizomes woody, with deciduous bark. Stems numerous, erect, 30-35 cm tall, base subterete, sparsely retrorse white pubescent, branched apically. Leaves oblong-ovate to narrowly lanceolate, 2-4 × 0.8-1.4 cm, papery, ± densely pubescent, base rounded to subtruncate, margin remotely 5-dentate-serrate, apex acute. Racemes terminal, 4-8 cm, mostly densely spreading glandular puberulent. Pedicel ca. 2.5 mm. Calyx ca. 3 mm, to 4.5 mm in fruit; scutellum ca. 1.25 mm, enlarged in fruit. Corolla purple-red, ca. 2.7 cm, glabrous inside; tube saccate-geniculate at base, to 7 mm wide at throat; middle lobe of lower lip ovate, ca. 6.5 mm wide, apex emarginate; lateral lobes ovate, ca. 2.5 mm wide. Nutlets tuberculate. Fl. Jun, fr. Jul-Aug.

* Near springs, valleys; 400-1200 m. Hebei, Henan.