Sorastrum is common in tropical to temperate regions of the world,[1] but due to its small size it is often overlooked.

[4] Individual cells are kidney-shaped, pear-shaped, or wedge-shaped, or spherical (in Sorastrum sphericum)[3] and attached to a central body of mucilage via gelatinous strands.

[5] Identification of species depends on the size and shape of the cells, particularly the spines.

Once divided, the zoospores are released from a tear in the mother cell wall.

Sexual reproduction has not been observed in Sorastrum, but is presumed to be similar to that of Hydrodictyon and Pediastrum.