The genus Brevilegnia (Saprolegniales, Oomycetes) in Japan

抄録

Three species of the genus Brevilegnia (Saprolegniales, Oomycetes) are described and illustrated from Japan: B. megasperma var. brevicaulis, B. unisperma var. litoralis, and B. variabilis. The Japanese B. variabilis agrees with the original description in demonstrating achlyoid- and dictyoid-type zoospore discharge patterns in addition to the thraustothecoid-type, which is the typical pattern in the genus, androgynous antheridial branch origin, and antheridial branches wrapping about the oogonia, but it produces larger oogonia and aplerotic oospores. All species are new records from Japan.