小紫黄芩 xiao zi huang qin

Herbs. Adventitious roots slightly swollen at middle. Stems ca. 45 cm tall, erect, densely pubescent, sometimes also pilose, leafless basally; branched apically. Petiole 1-3 cm; leaf blade circular to oblong-ovate, 2.5-6.5 × 1.7-4 cm, ± papery, sparsely villous, midrib and veins pubescent, base shallowly cordate to truncate, margin crenate, apex acute. Racemes terminal or subterminal 10-12 cm; bracts linear, ca. 2.5 mm, pubescent. Pedicel ca. 3 mm, densely glandular puberulent. Corolla red-purple, 1-1.2 cm, glandular puberulent outside, finely puberulent at throat inside, tube saccate geniculate at base, throat to 2.5 mm wide; middle lobe of lower lip triangular-ovate, ca. 3 mm wide, constricted on both sides, apex emarginate; lateral lobes ovate, ca. 1 mm wide. Nutlets unknown. Fl. Aug.

* Cunninghamia forests; 1400-1500 m. Yunnan (Xichou Xian).