伞藻属是绿藻的一个属，又称「人鱼酒杯」(mermaid's wine glass)。伞藻属的所有种都属于单细胞生物，外表呈现伞形。细长的伞柱长0.5∼10公分，而顶端有一圈分枝，形成伞盖。伞藻属的伞柱基部有一个大核，而当它成熟时会分裂，而胞子会随着细胞质流进孢子囊或伞的裂片中。由于伞藻属容易嫁接，因此他常被用于基因研究。

Acetabularia is a genus of green algae, specifically of the Polyphysaceae family, Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology. In form, the mature Acetabularia resembles the round leaves of a nasturtium, is 0.5 to 10 cm tall and has three anatomical parts: a bottom rhizoid that resembles a set of short roots; a long stalk in the middle; and a top umbrella of branches that may fuse into a cap. The single nucleus of Acetabularia is located in the rhizoid, and allows the cell to regenerate completely if its cap is removed. The caps of two Acetabularia may also be exchanged, even from two different species. In addition, if a piece of the stem is removed, with no access to the nucleus in the rhizoid, this isolated stem piece will also grow a new cap.