ON MODE OF RHYTMOLOGICAL EVOLUTION OF FERNS

摘要

Possible ways of rhythmological evolution of ferns are outlined on the basis of comparison of basal evergreen phenorhythmotype with derived rhythms occurring in temperate ferns. Terminal stages of intra-bud morphogenesis and extra-bud morphogenesis offronds of short-rhizomatous chamephytes and hemicryptophytes (Athyrium, Polypodium sp. div., Lepisorus, Pyrrosia, Nephrolepis, Asplenium bulbiferum, A. viviparum, A. trichomanes), long-rhizomatous erosulate hemicryptophytes (Gymnocarpium) and geophytes(Pteridium) are analyzed. Mode of biomorphological evolution resulting in change of phenorhythmotypes are detected.