The division of plants known as the Gnetophyta (gnetophytes) contain three living genera of woody gymnosperms:
Gnetum
Welwtischia
Ephedra
The Gnetophyta are different from the other gymnosperms because they have vessel elements, a characteristic that is commonin Angiosperms.
Cite this Page: Nelson, R. 2009. "Gnetophyta"
(OnLine) UntamedScience. Accessed Feb 09, 2012 at http://www.untamedscience.com/biodiversity/plants/gnetophyta