Materials to the Zygnemaceae of Poland. II. Observations on the development cycle of Zygnema biforme Jao. 1947, a species new for the European flora

Abstract

In the water sample taken on June 27, 1983 from the pond in Młogoszyn (Płock District) vegetative filaments and initial stages of conjugation of Zygnema biforme Jao were detected. In culture mature zygotes and their germination were observed. It is the second site of occurrence of this species in the world.

Keywords

• development
• Zygnema
• species new for European flora