Odd-pinnate compound leaves, 7-23 leaflets, ovate-lanceolate or elliptic, 5- 14 cm long, tapering apex, oblique base, serrate leaf margin, hairy below, only along midvein or vein axils. The preface is conical, and the flat-winged nutlet is born in the bud. The flowering period is May-June, and the fruit maturity is 9-65438+1October.
It is a common tree species in the Yangtze River basin and southwest provinces, and also distributed in Japan and South Korea.