叶柄(petiole)是叶片与茎的联系部分,其上端与叶片相连,下端着生在茎上,通常叶柄位于叶片的基部。少数植物的叶柄着生于叶片中央或略偏下方,称为盾状着生,如莲、千金藤。叶柄通常呈细圆柱形、扁平形或具沟漕。
叶状柄与叶片是同功器官,但它源于叶柄。
Phyllodes are analogous to leaf blades, but are derived from petioles (leaf stalks).
叶状柄与叶片是同功器官,但它源于叶柄。
一种伸展、扁平的叶柄,如果叶片缺失或退化则作为光合器官起作用。叶状柄在各种澳洲的金合欢属中较为常见。
Phyllode an expanded flattened petiole that ACTS as the photosynthetic organ if the lamina is missing or very reduced. Phyllodes are seen in various Australian species of Acacia.
应用推荐