胭木 yan mu

Periploca arborea Dennstedt, Schlüssel Hortus Malab. 13, 23, 25. 1818; Nerium tomentosum Roxburgh; Wrightia tomentosa (Roxburgh) Roemer & Schultes.

Trees to 20 m tall. Branches gray or brown, pubescent, lenticellate. Petiole 2-10 mm; leaf blade elliptic to broadly so or obovate, 6-18 X 3-8.5 cm, pubescent to glabrescent adaxially, tomentose abaxially; lateral veins 10-15 pairs. Cymes pubescent; peduncle to 2 cm. Pedicel 1-1.5 cm. Sepals ovate or broadly so, ca. 3 mm. Corolla yellowish, pinkish, or salmon, rotate or subrotate; tube 3-7 mm, glabrous; lobes narrowly elliptic to ovate, 0.8-1.6 cm, papillate; corona scales 10, shorter than anthers, glabrous inside, apex dentate. Ovaries connate. Follicles connate, cylindric, 14-21 X 3-4 cm, lenticellate. Seeds linear-fusiform, ca. 2 cm, coma ca. 3.5 cm. Fl. May-Oct, fr. Aug-Dec. 2n = 22.

Deciduous or mixed forests, stream banks; 200-1500 m. Guangxi, Guizhou, Yunnan [India, Laos, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam].