落葉喬木,高可達(dá)10m,樹(shù)身大可合抱。樹(shù)皮呈長(zhǎng)薄片狀,剝落后平滑細(xì)膩。小枝略呈四棱形,常有狹翅。單葉對(duì)生或近對(duì)生,橢圓形至倒卵形,長(zhǎng)3~7cm,近無(wú)毛或沿北面中脈有毛