多花山壳骨 duo hua shan ke gu

Eranthemum polyanthum C. B. Clarke ex Oliver, Hooker’s Icon. Pl. 20: t. 2000. 1891.

Herbs. Stems grayish, subterete, glabrescent. Petiole ca. 2.5 cm; leaf blade broadly ovate to oblong, 7-17 × (3-)4-9 cm, both surfaces glabrous, secondary veins 7-9 on each side of midvein, base cuneate and decurrent onto petiole, margin entire, apex acute. Thyrses 5-12 cm; bracts triangular, 3.5-4 × ca. 1.5 mm; bracteoles ca. 2 × 0.5 mm. Pedicel 1.5-2.5 mm. Calyx ca. 1 cm; lobes lanceolate. Corolla bluish purple; tube 3-3.5 cm; lower lip 3-lobed, lobes oblong and ca. 1.5 × 0.6 cm; upper lip 2-lobed, lobes ca. 11 × 3 mm. Staminal filaments short, distinct, inserted at throat. Ovary pilose; style basally pilose; stigma spherical. Capsule clavate, ca. 2.5 cm, pubescent. Seeds ovate in outline, ca. 3 × 3 mm, verrucose, glabrous. Fl. Apr-Jun, fr. Aug.

Forests, thickets; 300-1600 m. Guangxi, Yunnan [India, Malaysia, Myanmar, Thailand, Vietnam].

Plants misidentified as Rhinacanthus calcaratus (Wallich) Nees by C. C. Hu (FRPS 70: 268. 2002) belong here.