Blue-green algae of the Yamato-Yoshino river

Abstract

In this paper the writer lists thirty species belonging to the blue-green algae from the Yoshino river, the abundant species being Homoeothrix janthina, Phormidium corium, P. favosum, Nostoc parmeloides and N. sphaericum.
H. janthina (Rivulariaceae) usually occurs in abundance during warm months of a year from the upper reach to the lower reach.