Materials to the zygnemaceae of poland v. Two spirogyra species new for poland

摘要

Spirogyra occidentalis 9Transeau) Czurda 1932 and S. Scrobiculata (Stockmayer) Czurda 1932, two species new in the Polish flora and S. Pseudovarians Czurda 1930, a species only cited in literature, are described in samples collected in central Poland. The diagnosis of S. occidentalis and S. pseudovarians has been supplemented with measuring data of the inflated Sterile cells in conjugation filaments. The figures show the hitherto unknown inflated sterile cells.