Monographs Details: Anabaena aeruginosa 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:Nostocaceae
Description:Species Description - Trichomes relatively short and straight, aggregated into small masses or free-floating, 3.2-4 µ diam., not attenuated; cells bright aeruginous, subspherical, seemingly loosely attached to each other; apical cell blunt-rounded; heterocysts' like the cells in form, 5-6 µ diam.; spores broadly dolioform, 2 µ catenate between the heterocysts, about 10 p diam. and 15 n long, contents densely and coarsely granular, bright aeruginous, walls smooth, hyaline.

Distribution and Ecology - Growing in company with Anabaena Willei and other algae about five kilometers east of Coamo, no. 237 b, type.

Discussion:

PLATE 12, FIGURE 11

This species of Anabaena belongs in the Dolicliospernmm section of the group, proposed by Kalfs (Nostoch. 325, 1850) but has straight spores instead of curved ones, characteristic of most of the species of the section. Its closest affinity seems to be A. oblonga De Wilden.