Monographs Details: Chroococcus muralis N.L.Gardner
Authority: Gardner, Nathaniel L. 1927. New Myxophyceae from Porto Rico. Mem. New York Bot. Gard. 7: 1-144. pl. 1-23.
Family:Chroococcaceae
Description:Species Description - Families composed of 2-4 cells, closely aggregated, but not at all coalescent; families of four, 5-6.5 µ diam. with tegument; single cells 3.5-4 µ diam. with tegument, 1.5-2 µ diam. without tegument, spherical, pale aeruginous, obscured by the membranaceous, firm, smooth, homogeneous, purplish-violet tegument.

Distribution and Ecology - Growing on a wall, Coamo Springs, no. 301, type.

Discussion:

PLATE 2, FIGURE 15

The species is to be distinguished from others by the small size of the cells and by the violet-colored tegument.