Actually, the only true way to tell is by DNA testing.

A good friend of mine is a Scientific Assistant at DFG, and he states that even their biologists can't tell from visual inspection. They must take samples to find out for sure.

Although I do know that in our impoundments, it is going to be extremely rare to have a largemouth that is 100 percent pure, the Florida's have been in our impoundments for many years, and have cross bred significantly.

I would assume that the largest majority of the initial pure Florida plants have died, now that they have been here for 15 plus years.

DanO