Abstract
Abstract Recent advances and problems in pteridological research. - The first part of this invited lecture deals with the taxonomic position of the Pteridophyta in the Vegetable Kingdom (Chart 1) and particularly the recognition of them as an independent division, distinct from Bryophyta as well as from Spermatophyta but nearer the latter than to the former. Accordingly, in the author's opinion, the Cormobionta can be subdivided into two main groups (Chart 1, and Fig. 2): the Bryophytonta, with the sole division of Bryophyta, and the Stelophytonta, consisting of the Pteridophyta and Spermatophyta. The Bryophytonta are regarded as a conservative phyletic line with low perspective power, running independently since the most remote time from the Stelophytonta (Fig. 1), which, rich in evolutive potentialities, were by far more successful than the former. The extant Pteridophyta are classified according to the scheme proposed by the author in 1977, which shows all taxa from the rank of subdivision to that of f...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
