I've rescued a few from derelict farm-house gardens, churchyards, cemeteries, road verges etc - hot pink, washy pinky-mauvy, orange, yellow, yellow with a reddish-brown back and various unsatisfactory bluey-greeny-turquoise-ish things that are NOT Teal Blue. It seems they hybridise quite freely which indicates that separate colour forms isolated in the 19th C, and given cv names, could soon revert to muddier colours once the places where they were grown became derelict with farmers etc moving when waves of drought, or wild bushfires, made relocation necessary.