Stigonema mesentericum Geitler

Die Süsswasser-Flora Deutschlands, Österreichs und der Schweiz 184, f. 223 (Geitler 1925). Desikachary, Cyanophyta 607, t. 134, f. 5-7 (Desikachary 1959).

DESCRIPTION. — Filament prostrate, dense with sometimes very short protuberant branches, coralloid like; sheath firm, transparent or yellow brown; trichome mostly with 2 - 4 or sometimes with many rows of cells, in older part of the filament cells with a special envelop; heterocysts intercalary (Fig. 8P).

DIMENSION. — Cells 3.6-11.3 µm broad; heterocysts 5.0-6.0 µm broad.

ENVIRONMENT & HABITAT. — Terrestrial species; moist rocks; temperature 4°C.