The Cycads
A relict plant group of the past
Introduction
Introduction
This is a presentation
of the worlds cycads, a very primitive group of vascular plants, survived
more than 200 million years since they arose. The Cycads are very ancient
as plant group. They were on their richest and having the widest distribution
in the Mesozoic era, and played an important role of the Triassic and Jurassic
vegetation, i.e. for about 220 to 120 million years ago. Since then, they
have been in decline
and today they have only a relict distribution.
