Monographs Details: Stigonema pauciramosum N.L.Gardner
Authority: Gardner, Nathaniel L. 1927. New Myxophyceae from Porto Rico. Mem. New York Bot. Gard. 7: 1-144. pl. 1-23.
Description:Species Description - Filaments 300-450 µ long, 23-27 µ diam., not tapering, branches very sparse, similar to the main filaments, not constricted at the base; cells compressed-spherical, 17-19 µ diam., one-half to two-thirds as long as the diameter, pale aeruginous, homogeneous, strictly uniseriate in the filament except where branches arise, contiguous or slightly separated when old; heterocysts fairly numerous, of the same shape and size as the cells; sheath thick, hyaline, homogeneous, subgelatinous.
Distribution and Ecology - Growing among other species of Myxophyceae, e.g., Scytonema javanicum, on lava north of Sabana Grande, no. 921 a, type.
PLATE 23, FIGURE 59
This is a very distinct species of Stigonema, with relatively short, straight, and sparsely branched filaments containing a single series of subspherical to much compressed cells, a thick hyaline sheath, and conspicuous, large heterocysts, a combination of characters most nearly approached by Stigonema elegans and S. scytonematoides, both of this paper.