叶迹 leaf trace

互联网2013-11-15

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叶迹 leaf trace 高等植物茎的节上长有叶片时，从茎分出进入叶片的维管束称为叶迹。在这种情况下，有形成叶隙的，也有不形成的。双子叶植物现在以三叶迹者居多

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