海南黄芩 hai nan huang qin

Herbs perennial, puberulent, with woody rhizomes and stem bases. Stems ca. 60 cm tall, with adventitious roots at base, ascending, 1- or 2-branched, densely puberulent, basal internodes longer than leaves. Petiole 6-9 mm; leaf blade broadly ovate to subcircular, 2.5-5 × 1.8-4.3 cm, ± leathery, adaxially sparsely puberulent, abaxially purplish and densely puberulent, base broadly cuneate to shallowly cordate, margin 4-6-undulate-crenate or entire, apex obtuse to acute. Racemes terminal, ca. 6 cm; bracts sessile, ovate-lanceolate, 3-5 mm, densely pubescent, apex acute. Pedicel ca. 4 mm, densely pubescent. Calyx ca. 2.8 mm, densely puberulent; scutellum spreading, semicircular, ca. 2.2 mm. Corolla cream-white, ca. 2 cm; tube ca. 1.6 cm, bent at base, gradually dilated above middle to 7 mm wide at throat, puberulent outside, villous on basal 1/4 inside; upper lip erect, broadly triangular-ovate, ca. 5.5 mm wide, base slightly constricted, apex obtuse; middle lobe of lower lip spreading, ovate-orbicular, base ca. 5 mm wide, emarginate; lateral lobes ovate, ca. 3 mm wide. Nutlets unknown. Fl. Oct.

* Rocky mountainous areas. Hainan.