Anatomical structures of roots and leaves were observed in three wild plants of Allium.mongolicum,A.polyrhizum and A.tenuissimum from Inner Mongolia arid grassland.The results were as follows.1.Types of roots in the three plants were tetrarch or pentarch.Cortexes were thick,taking about 90% of radius in a section.2.The leaves were composed of epidermal tissues,photosynthetic tissues,water storage tissues and vascular tissues.Outer walls of epidermal cells were thickened and sunken stomas.Palisade tissues we...
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