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yang shu zhi wu xin fen lei qun ( er )
Author(s): 
Pages: 105-120
Year: Issue:  2
Journal: Bulletin of Botanical Research

Keyword:  植物新分类群模式标本中国科学院新变种小叶杨小黑杨新变型圆锯齿昆明植物研究所杨属;
Abstract: <正> 乔木,高15米,胸径40厘米。树皮灰褐色,纵裂;枝淡黄灰色,无毛,小枝赤褐色,具棱,被柔毛;芽圆锥形,暗赤褐色,有粘质,边缘被柔毛。叶卵形至宽卵形,革质,较厚,长5—10厘米,先端短渐尖,基部心形,边缘圆锯齿,具缘毛,表面暗绿色,背面苍白色;叶柄圆柱形,长
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