[Sharlin]

Not nearly as drastic as the cabbage case, but to me it’s also interesting that there are three ancestral, wild species of citrus fruit – mandarin, pomelo, and citron – and all the popular modern cultivars are hybrids of those three.

[EdwardDiego]

There's other wild citrus genes involved in there too for some species.

https://www.jlauf.com/writing/citrus/

[culi]

And there are also stuff like finger limes, kumquats, etc that don't at all fit into this citrus triangle