Petrocodon asterocalyx F.Wen, Y.G.Wei & R.L.Zhang
Petrocodon Hance Perennial herb. Rhizome subterete, stemless, 1.5–5 cm long, 0.3–0.5 cm in diam. Leaves 6–10 or more, all basal, with petiole, leaf blade symmetric or slightly asymmetric in each pair, coriaceous, fragile and easily broken, rhombic-oblong or rhombic, 6.5–13.5 × 2–6...