This article is within the scope of WikiProject Plants, a collaborative effort to improve the coverage of plants and botany on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
There were two articles on the same taxon, Progymnospermophyta and this one. As this one was better (and in particular properly referenced), I have merged the content here. Peter coxhead (talk) 09:57, 7 March 2011 (UTC)