R' Micha Berger wrote:
> My point was about concord grapes, not the hybrid. I'm using
> the infertility of the hybrid to prove that lehalakhah, they
> are separate species.

Yes, but here's the catch: I know that infertility of a hybrid 
defines separate species of animals. Does this rule also hold for 
fruits?

Any kilayim experts out there? Surely this question has been already 
investigated by those who are defining which grains are of the 5 
minim, and many other halachos.

Akiva Miller