【摘要】 手掌参（gymnadenia conopsea）根的皮层中有发达的通气管道.茎中维管束两轮排列,外轮维管束较小.髓部薄壁细胞破裂成2-3个大的气腔,叶脉维管束鞘类似于C₃植物.更多还原

【Abstract】 There is a big aerenchyma canal in the root’s cortex of Gymnadenia Conopsea. In the stem,the vascular boundles are arranged in two layers. Its pitch cavity is big. The Vein’s bundlesheath is type of C₃.更多还原