The only plant groups with earlier origins are non-vascular, such as green algae, mosses, liverworts and hornworts. The clubmosses originated about 410 million years ago, long before the dinosaurs, ...

Wikipedia.com, a favorite online resource, presented a web page about Marchantiophyta, a division of non-vascular land plants ...

They have a circulatory system, unlike non-vascular plants such as mosses and liverworts. "This is the first time we have had ...