Rhizoid a unicellular rootlike structure found in certain algae and in the gametophyte generation of the bryophytes and some ferns 假根：在一些藻类、苔藓植物和裸子植物配子体中存在的由单个细胞形成的类似根的结构。
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Cladophorales an order of chlorophyta ( green algae ) , generally called siphonaceous algae . they are multicellular saclike forms or branched filaments with branching rhizoidike holdfasts , e . g . cladophora 刚毛藻目：绿藻门中的一目，称为虹吸管状的藻类。它们是多细胞囊泡状的或分枝的丝状体，用分枝状的假根固着。例如刚毛藻属。
