Family Ephedraceae Dumort. – Ephedra Family
- Ephedra nevadensis S. Wats – Mormon tea – (southwestern North America)
- Ephedra viridis Colville - Green Mormon tea - (north & southwestern North America)
Family Gnetaceae Lindley – Gnetum Family
- Gnetum gnemon L. - Melindjo – Female & Male - (Singapore)
Family Welwitschiaceae Markgraf. – Welwitschia Family
- Welwitschia mirabilis Hook. f. - Tree tumbo - (Namibia)
