Monographs Details: Hypheothrix longiarticulata 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, scattered among other Myxophyceae, 4.5-5.5 µ diam., moderately regular and smooth along the surface, more or less branched near the ends; trichomes mostly single, occasionally two in a sheath, 1.7-2 µ diam., not constricted; cells 8-12.5 µ long, homogeneous; apical cell conical; sheath homogeneous, white.

Distribution and Ecology - Growing on a wall in Fort San Cristobal, San Juan, no. 2022 a, type.

Discussion:PLATE 10, FIGURE 95