| Initials | Reference |
| AGS | The Alpine Garden Society Journal (With Year) |
| BTW | B&T World Seeds |
| Species | Species Hybrid | Ploidy | Colour | Scent | Reference (With Dates) | Location (Where Known) |
| C.ajacis | x | x | x | x | AGS(01/02)2249 | x |
| C.ambigua | x | x | x | x | x | Ref 1 |
| C. regalis | x | x | x | x | AGS(88/89)2120 | (1) Mt Menalo, Arkadia May 2000 Ref: http://www.marengo.supanet (2) Image of C. regalis Flora von Deutschland Österreich und der Schweiz, 1885, Gera, Germany |
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