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yang shu zhi wu xin fen lei qun ( er )
Author(s): Wang Chan Tung Shi-ling
Pages: 105-
120
Year: 1982
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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