Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Gnetophyta Bessey |
| class | Ephedropsida Reveal |
| order | Ephedrales Dumortier |
| family | Ephedraceae Dumort. |
| genus | Ephedra Tourn. ex L. - jointfir |
| species | Ephedra fasciculata A. Nels. - Arizona Jointfir |