Abstract
SummaryThe systematic position of Ophioglossaceae was examined using available evidence from recent anatomical and morphological studies. Although the Ophioglossaceae are free‐sporing vascular plants like the Filicopsida, and are therefore commonly placed in that group, the character correlation of eustelic or sympodial primary vascular system of stem, the presence of vascular cambium, periderm, circular bordered‐pitted tracheids, the anatomy of axillary branching, solitary sporangia, and also noncircinate vernation indicate a relationship of the family with the progymnosperm‐seed plant line. It is suggested that the Ophioglossaceae are living progymnosperms and, among extant seed plants, the family is most closely related to Cycadopsida, both having large, fernlike leaves. It is pointed out that the Ophioglossaceae resemble glossopterid gymnosperms in the three‐dimensional structure of their leaves with epiphyllous sporophores.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
