Abstract
POLLEN grains with the same shape, approximate size-range and exine characters as those of Ephedra and Welwitschia have been found recently in certain Lower Tertiary deposits in south-eastern Australia. The pollen grains of Ephedra and Welwitschia1 are characterized by the more or less prominent longitudinal ridges into which the exine is raised, and the structureless nature of the exine itself; but, whereas those of Welwitschia have a distinct germinal furrow, the pollen grains of most species of Ephedra have no furrow. The absence of a furrow from the Australian fossil pollen grains in question suggests that they are more closely related to Ephedra than to Welwitschia.
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.
