Monographs Details: Oscillatoria granulata 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:Oscillatoriaceae
Description:Species Description - Plants not forming a distinct stratum, but interspersed among other algae; trichomes relatively long and flexuous, neither constricted nor attenuated, 3.4r-3.8 µ diam.; cells for the most part quadrate, conspicuous by the presence of granules at the distinct cross-walls; apical cells blunt, end wall slightly thickened.

Distribution and Ecology - In a pool at the Park, Santurce, no. 51 b, type.

Discussion:

PLATE 8, FIGURE 71

The species is especially marked by the large granules crowded at the cross-walls. In mature specimens even the terminal walls have them. The terminal wall is not very conspicuously thickened.