Monographs Details: Plectonema tenuissimum 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 - Filaments prostrate or scattered among other filamentous algae, 1.4-1.6 µ diam.; trichomes slightly constricted at the dissepiments, especially at the meristematic ends, not attenuated; cells aeruginous, quadrate, cross-walls plainly visible; apical cells rounded; sheath scarcely discernible, except in the very oldest parts, hyaline; branching very sparse.

Distribution and Ecology - Growing on the wall of a house in Maricao, no. 1049 h, type.

Discussion:PLATE 10, FIGURE 91