 
| Genus Name | Genus | Grex Name | Year | Author | |
|---|---|---|---|---|---|
| Add+ | Platanthera | P | nivea | 1972 | (Nutt.) Luer | 
| Add+ | Peristylus | Peri | niveus | 1898 | (Nutt.) Kraenzl. | 
| Add+ | Gymnadenia | Gym | nivea | 1835 | (Nutt.) Lindl. | 
| Add+ | Gymnadeniopsis | Gymnadeniopsis | nivea | 1901 | (Nutt.) Rydb. in N.L.Britton | 
| Add+ | Habenaria | Hab | nivea | 1826 | (Nutt.) Spreng. | 
| Add+ | Orchis | Orchis | nivea | 1818 | Nutt. | 
 
 
