Petrocosmea coerulea C.Y. Wu ex W.T. Wang
Petrocosmea Oliv. Perennial herb with short rhizomatous stem and crowded fibrous roots. Leaves 7–15 per plant, all basal; petioles 1.5–2.7 cm, dark purple, densely tomentose; blades borne on a stalk attached to the lower surface, narrowly oblong, narrowly elliptic to elliptic, lance-ovate...