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 | Magnoliophyta Cronquist, Takht. & W.Zimm. - flowering plants |
| class | Rosopsida Batsch - eudicots |
| order | Rosales Perleb |
| family | Rosaceae L. |
| genus | Horkelia Cham. & Schltdl. - horkelia |
| species | Horkelia hendersonii T.J. Howell - Henderson's Horkelia |
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