I want to get 1 or 2 cultivars eventually. Medlar can be grafted on to pears. Medlar are cross compatible with Hawthorns. Even more weird is that they produce graft chimera with hawthorns.
If you want access Go the USDA, Corvallis keeps Medlar in the repository. Corvallis. Dont worry about everything being marked unavailable. Corvalllis does that during the off season.
the most complex pom cross I know read about it ‘Titaan’ Sorbus x (Sorbus x Arnoia) x Malus x pyrus