What is Progymnosperm?
'''Progymnosperms''' are ancient plants that don't exist anymore. They were like woody plants with [[spore|spores]] and probably came from [[trimerophytes]].<ref name=gk>{{cite book| vauthors = Stewart WN, Rothwell GW |title=Paleobiology and the evolution of plants|year=1993|publisher = Cambridge University Press|page=521pp}}</ref> Later, they led to the development of [[gymnosperms]], which are the ancestors of [[gymnosperm|acrogymnosperms]] and angiosperms ([[flowering plants]]). People sometimes call them '''Progymnospermophyta''' or '''Progymnospermopsida'''. {{taxobox | name = Progymnosperms {{br}}Middle Devonian – Lopingian | image = Archaeopteris.JPG | image_caption = ''Archaeopteris'' fossil leaves | regnum = [[Plant]]ae | classis = †'''Progymnospermopsida''' | display children = 1 | subdivision ranks = Orders }} ==References== {{reflist}} ==Other websites== *[http://comenius.susqu.edu/biol/202/ARCHAEPLASTIDA/VIRIDIPLANTAE/Vascular%20Cryptogams/PROGYMNOSPERMOPHYTA/default.htm Progymnospermophyta] {{Webarchive|url=https://web.archive.org/web/20150402154657/http://comenius.susqu.edu/biol/202/archaeplastida/viridiplantae/vascular%20cryptogams/progymnospermophyta/default.htm |date=2015-04-02 }} *[https://books.google.com/books?id=0DfYJsVRmUcC&dq=Progymnospermophyta&pg=PA723 Botany: an introduction to plant biology] [[Category:Seed plants]] [[Category:Fossil plants]] [[Category:Extinct plants]] {{biology-stub}}