Talk about the class of Gnetopsida

Some common characteristics with gymnosperms and some with angiosperms. They are unique among gymnosperms in having vessels in their xylem. three genus: Gentum: shrubs or vines with large leathery leaves. Ephedra: much branched shrubs with scaly leaves. Welwitshia: Most of its body is a long underground taproot. Its short, wide stem forms a shallow disc from which two ribbon like leaves extend.