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Abstract
COJ Technical & Scientific Research
What are Cycads?
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Open or CloseAndrew P Vovides*
Instituto de Ecología, Mexico
*Corresponding author: Andrew P Vovides, Instituto de Ecología, Mexico
Submission: January 26, 2019; Published: February 5, 2019
Abstract
Cycads are amongst the most ancient group of living seed plants known and have a fossil history that dates to more than 200 million years [1]. They were at their height during the times of the dinosaurs, forming part of the world vegetation during the Mesozoic era (160million years ago). They superficially resemble palms or even ferns though totally unrelated since they do not bear flowers but cones. They are gymnosperms that include conifers, and cycads occur in separate sexes there being female and male plants. Cycads had a much wider distribution during the historic past with fossils found in Alaska, Russia, Britain and the USA.
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