Foliaceous Marginal Processes standing nearby Poles of the Valve of Dimeregramma minus (Gregory) Ralfs

Abstract

Cells of Dimeregramma minus were cultivated in Petri dishes for some months. Valves were carrying one or two foliaceous processes standing nearby the ocelli in the rows of marginal processes. The expanded planes of those foliaceous processes are rather flat and spacious, and they are palaceous and connected to the vertical marginal processes which are as if their leafstalks.