Electron and light microscopical observations on the perine of the spores of some Bolbitis species (Filices)

The perine in the leptosporangiate fern genus Bolbitis as present in the mature sporangia either surrounds the individual spores or forms an intricate cellular structure by which the spores are interconnected. The perine appeared to consist in some species of 2 separate layers which are variously differentiated or not. Differences in the perine do not seem to provide evidence for keeping the genera Egenolfia and Bolbitis separate, as was recently suggested by some Indian authors.