Curiously, my wife and I tried to 'cure ourselves' a few years back. We bought field guides, studied classes of wild grasses and such that might be common in the midwest. Then we went out over our 80 acres of fallow ground and tried to identify everything we could.

We came up with four (4) different plants. The brome grass we'd planted as a cover crop, Queen Anne's Lace, ground cherries and the occasional thistle. That was it.

Now, we may still have been 'plant blind' and not capable of recognizing or even seeing anything else. Or, 80 years of monoculture followed by 5 years of letting it go fallow weren't enough to permit much else to grow yet. I don't know.