Monographs Details: Oscillatoria tortuosa 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 - Trichomes very tortuous, at times completely circinate, relatively short, 2.5 µ diam.; cells cylindrical, quadrate to one-third as long as broad, homogeneous to very finely granular, paleaeruginous; cross walls inconspicuous, not granular; 2-4 apical cells acute-conical, at times slightly uncinate.

Distribution and Ecology - Growing on or within the gelatinous tegument of Aphanothece conferta P. Richt. on a water pipe near a stream by Maricao, no. 1147 a, type.

Discussion:

A species closely related to Oscillatoria artiadata, but is tortuous, attenuate, and at times uncinate.