| Zaadpanten | Gymnospermen |
| Domein | Eukaryota Whittaker & Margulis |
| Supergroep | Archaeplastida (Plantae) Adl et al. |
| Rijk | Viridiplantae Cavalier-Smith |
| Subrijk | Streptobionta Kenrick & Crane |
| Superstam | Embryophyta Engler |
| Stam | Pinophyta Cronquist, Takht. & W.Zimm. ex Reveal |
| Substam | Pinophytina Cronquist, Takht. & Zimmerm. ex Reveal |
| Klasse | Pinopsida Burnett |
| Subklasse | Cupressidae Cronquist, Takht. & Zimmerm. ex Reveal |
| Orde | Cupressales Link |
| Familie | Cupressaceae Gray |
| Subfamilie | Cupressoideae Rich. ex Sweet |
| Geslacht | Thuja L. |
| Soort | occidentalis L. |
Thuja occidentalis L.
