| Genus Name | Genus | Grex Name | Year | Author | |
|---|---|---|---|---|---|
| Add+ | Aulosepalum | Aul | nelsonii | 1982 | (Greenm.) Garay |
| Add+ | Spiranthes | Spir | obtusa | 1918 | Schltr. |
| Add+ | Deiregyne | Dei | nelsonii | 1988 | (Greenm.) Burns-Bal. |
| Add+ | Spiranthes | Spir | nelsonii | 1900 | Greenm. |
| Add+ | Sarcoglottis | Srgt | nelsonii | 1947 | (Greenm.) Conz. |