Lu-liang

— Both morphologically and geographically this species is intermediate between P. pekinensis Rupr. and P. sericanthus Koehne. The pubescence of its leaves resembles that of P. sericanthus Koehne, but Koehne’s species has pubescent hypanthia. It is probably a natural hybrid of a northern species with some southern influence. It occurs in woods at altitudes of 1500-2000 meters in the Tsingling mountains, and its range extends northward along the Shansi and Kansu border, reaching the Lu-liang mountains. Its white flowers appear in June.