That history began with the origin of the primitive, unicellular aquatic algae of the Precambrian Eon. Except for the blue-green algae and bacteria, the fossil record of this earliest part of plant evolution is extremely poor.

• 最初，前寒武纪出现原始的单细胞水生藻类，除了蓝绿藻和细菌之外。这个最早部分的植物演化化石纪录是极其简单的。