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The earliest known vascular plants.
http://www.xs4all.nl/~steurh/eng/rhynia.html 
 Transverse section of a stem.
http://www4.ncsu.edu/unity/lockers/project/dendrology/index/plantae/vascular/vascular.html 
 Description and diagram of Rhynia, the first known vascular plant for which a complete fossil has been found.
http://www.xs4all.nl/~steurh/eng/old2.html 
 Rhynie Chert.
Home > Science > Earth Sciences > Paleontology > Paleobotany > Taxa > Rhyniophyta
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