Nerium coccineum Loddiges, Bot. Cab. 9: t. 894. 1824.

Trees to 20 m tall. Bark pale gray to brownish; branchlets lenticellate, glabrous. Petiole ca. 5 mm; leaf blade elliptic to ovate, 5-17 X 3-8 cm, glabrous or puberulent along veins abaxially, base obtuse to acute, apex caudate-acuminate; lateral veins 8-14 pairs. Flowers solitary or in cymes, 2-3.5 cm. Sepals broadly ovate, 5-9 mm. Corolla reddish, funnelform; tube campanulate, shorter than calyx; lobes broadly obovate, papillate; corona crimson, cup-shaped, apex incised. Anthers exserted. Ovaries connate. Follicles linear, connate, 14-20 cm, conspicuously lenticellate. Seeds linear, ca. 2 cm, coma to 4 cm. Fl. Jan-May, fr. Jun-Dec. 2n = 22.

Dense montane forests; 300-1800 m. SE Guangxi, S Yunnan [India, Myanmar, Pakistan, Thailand].