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perisperm n.【植物;植物學】外胚乳。

perisphere

Their differences are based on many aspects which include characteristics of morphology , anatomy and epidermis of leaf , types of tapetum in anther walls , patterns of endothecial thickenings , and ways of development of endosperms , presence or absence of perisperm , components of photochemistry , and sequences of rbcl 菖蒲屬與天南星科其它屬在葉的形態、結構、表面特征,花藥絨氈層類型,藥室內壁增厚的特點,胚乳的發育方式,外胚乳的有無,植物化學成分, rbcl基因序列等多方面存在著顯著的差異。

Food materials may be stored in a special tissue derived from the nucellus, called the perisperm . 營養物質可以貯藏于由珠心產生的一種特殊組織,叫外胚乳。