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美国紫树Nyssa sylvatica 原产西欧,珙桐科蓝果树属形态特征落叶乔木,树高9～15米、直立生长,树冠圆锥形,随着树龄的增长,树冠逐渐敞开呈卵型。枝条水平生长,枝干红棕色,光滑,第二季变成浅灰色。叶全缘,单叶互生,叶片长5～13厘米,宽2.5～7.5厘米,倒卵形或椭圆形,夏季叶片呈现油亮的深绿色,秋季开始变黄、橘黄、橘红,之后为鲜红色、形成秋季一道亮丽的风景线;春天5月开花,花小白色,略带嫩绿,
The United States of America purple Nyssa sylvatica native Western Europe, Davidiaceae blue fruit tree morphological characteristics of deciduous trees, 9 to 15 meters high, erect, crown conical, with the growing tree crown gradually open ovate. Branches grow horizontally, branches reddish brown, smooth, the second season turned light gray. Leaf entire, single leaf alternate, the leaves 5 to 13 cm long, 2.5 to 7.5 cm wide, obovate or oval, the summer leaves showing shiny dark green, autumn begins to turn yellow, orange, orange, then bright red, forming a beautiful autumn Of the landscape; spring May flowering, flowers small white, slightly green,