The Great Nicobar Island is considered as a unique zone of biodiversity housing many rare, endangered and endemic plant species. The pteridophytic species of the region possess a narrow range of ...

After a critical evaluation of the concept of dichotomous branching in Cormophytes the shoot apical meristems of Psilotum triquetrum and Selaginella speciosa are described. In Psilotum only the ...

Psilotum triquetrum, Swartz (Psilotum nudum (L.) Beauv.) has been listed recently around Port St. John's, Cape Province (Jacot-Guillarmod, A. personal communication, 1961) and in Natal, where it ...

Some botanists view Psilotum nudum as a living fossil, very similar in structure to the earliest vascular plants. Figure A shows the vascular cylinder of the Psilotum nudumsporophyte. B is a preserved ...

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