Petrocosmea peltata Merrill & W. Y. Chun, Sunyatsenia 2: 320. 1935.

Petiole 0.6-2(-5) cm, puberulent; leaf blade ovate to broadly ovate, 1.2-2(-4.5) X 0.5-1.5(-2.5) cm, margin repand to entire, apex obtuse to rounded. Peduncle 2.5-4(-8) cm, pub-erulent; bracts narrowly triangular to linear, 0.7-1 mm. Calyx segments lanceolate to narrowly ovate, 1.5-2.5 X 0.7-1 mm, outside pubescent. Corolla ca. 8 mm; tube ca. 4.5 mm; adaxial lip ca. 2.2 mm; abaxial lip ca. 3.5 mm. Filaments ca. 1.8 mm, glabrous; anthers ca. 1 mm, white villous; staminodes ca. 0.25 mm. Ovary ca. 1 mm, densely appressed puberulent. Style 4-6 mm, glabrous. Capsule ca. 3 mm in diam. Fl. Dec-Feb.

* Streamside rocks in forests in hilly regions; 300-700 m. Hainan.