Based on news articles I've read in the past, yes.

I want to say it was Monsanto?

If I remember right, Basically they had some crop that was resistant to a specific type of plant killer, some guy killed a bunch of his own plants in order to cherry pick the commercial ones, then the next season he grew a ton of it, and they sued him for it. I think his initial defense was basically "well it was stuff that blew into MY field so it's fair game" (which I 100% agree with, even if I DID think plants should be patentable)