Nostoc commune var. sphaeroides is an edible cyanobacteriumTakenaka, H; Yamaguchi, Y; Sakaki, S; Watarai, K; Tanaka, N; Hori, M; Seki, H; Tsuchida, M; Yamada, A; Nishimori, T; Morinaga, T. Safety evaluation of Nostoc flagelliforme (nostocales, cyanophyceae) as a potential food. Food and Chemical Toxicology. 1998; 36(12): 1073-1077. found in diverse habitats such as lakes and rivers. It is used as a food and nutritional supplement and has reputed pharmaceutical properties.
References
External links EL Cushuro o Murmunta, Lo que da fuerza a la vida (Cushuro or Murmunta-that which makes one strong)