Petrocodon chongqingensis F. Wen, B. Pan & L.Y.Su
Petrocodon Hance Perennial herbs，rhizomes 5 － 2 cmlong，ca． 4 mm in diameter． Leaves 6－20，leaf blade elliptic to × 0．5－3．8 cm，slightly acuminate to obtuse at apex，cuneate to broadlycuneate at base，margin to nearly entire; adaxially surface green，abaxially pale green，both surfaces...