| Genus Name | Genus | Grex Name | Year | Author | |
|---|---|---|---|---|---|
| Add+ | Arthrochilium | Arh | royleanum | 2003 | (Lindl.) Szlach. |
| Add+ | Limodorum | Limo | royleanum | 1891 | (Lindl.) Kuntze |
| Add+ | Amesia | Amesia | royleana | 1925 | (Lindl.) Hu |
| Add+ | Cephalanthera | Ceph | royleana | 1879 | (Lindl.) Regel |
| Add+ | Helleborine | Helleborine | royleana | 1927 | (Lindl.) Soó |