Monographs Details: Scytonema mirabile var. majus 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:Scytonemataceae
Description:Species Description - Filaments 1-2 mm. high, 22-28 µ diam.; trichomes 9-14 µ diam.; cells purplish gray, finely granular in part.

Distribution and Ecology - Growing on damp rocks about five kilometers north of Utuado, no. 1617, type; about ten kilometers north of Utuado, no. 1563.