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作 者 ：张青松 于兆英

期 刊 ：西北植物学报 1989年 2期

关键词：杨属；叶柄；解剖学；

Keywords:Populus, Petiole, Anatomy,

摘 要 ：

Abstract:This paper describes the anatomical structure of the petiole in 10 species of Populus, the 10 species have been divided into three sections. Three vascular bundles euter the base of petiole, in transverse sections through the distal end, petiole is exhibi

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