Petrocodon longitubus Cong R.Li & Yang Luo
Petrocodon Hance Herbs, perennial. Rhizomes 5–15 cm long, 4–6 mm in diameter; with many long fibrous roots. Leaves alternate or crowded at apex of rhizome; petiole 2–4.5 cm long, densely reddish purple pubescent; blade thickly papery, ovate, 2.5–5 × 1.4–2.5 cm, base...