| Genus Name | Genus | Grex Name | Year | Author | |
|---|---|---|---|---|---|
| Add+ | Cyrtochilum | Cyr | williamsianum | 2001 | (Dodson) Dalström |
| Add+ | Cyrtochilum | Cyr | rodrigoi | 2001 | (Königer) Dalström |
| Add+ | Oncidium | Onc | williamsianum | 1996 | Dodson |
| Add+ | Trigonochilum | Tgc | williamsianum | 2008 | (Dodson) Königer |