兰果树Nyssa sinensis oliver,又名紫树、宜沙木,我省湘南一带群众称东瓜泡,属紫树科Nyssaceae。落叶乔木,高达30米,胸径50多厘米或更粗。树冠广卵形,树皮粗糙,灰褐色,片状剥落,幼枝灰绿色,老枝褐色,有皮孔。单叶互生,长椭圆形,长8—15厘米,宽3—6厘米,全缘,边缘内曲,相状网脉,表面平滑,背面凸起,浅绿色,入秋变红色。花雌雄 Nyssa sinensis oliver, also known as purple tree, Yi Shamu, Hunan Province, said the masses in the east of East melon bubble, is a purple Nyssaceae. Deciduous tree, up to 30 meters, more than 50 centimeters in diameter or thicker. Crown broad oval, rough bark, taupe, flakes, young branches gray-green, old branches brown, lenticels. Single leaf alternate, oblong, 8-15 cm long, 3-6 cm wide, the edge of the song, the shape of the network reticular veins, the surface smooth, convex back, light green, autumn into the red. Male and female flowers