Scytonema subgelatinosum N.L.Gardner
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Authority
Gardner, Nathaniel L. 1927. New Myxophyceae from Porto Rico. Mem. New York Bot. Gard. 7: 1-144. pl. 1-23.
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Family
Scytonemataceae
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Scientific Name
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Description
Species Description - Filaments erect for the most part, more or less fasciculate, sparsely branched, about 1 mm. long, 10-13 µ diam.; trichomes clavate at the outer apical end, 3-5 µ diam. in the older parts, 6-9 µ diam. at the apices; cells up to 24 µ long, cylindrical or slightly dolioform in the middle and older parts, decidedly dolioform at the apices in some of the younger filaments, pale aeruginous, homogeneous; cross-walls very inconspicuous; heterocysts of the same size and shape as the cells; sheath relatively thick, subgelatinous, homogeneous, hyaline; branching mostly single but some geminate.
Distribution and Ecology - Growing on rocks by a water reservoir in Eio Piedras, no. 108, type; on rocks at the Experiment Station, Rio Piedras, no. 174; on rocks by the road to Monte Montoro, Mariacao, no. 1066; north of Maricao, no. 1246.
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Discussion
PLATE 15, FIGURE 29