TKHousewife has found the closest thing I've seen to date: Bunchberry. I have my doubts as to this, though, simply because bunchberry is not at all heat tolerant, and I know that Maggie Katzen lives in a hot area of Texas.
Who knows? Maybe it's a close kin of bunchberry, or a heat-tolerant weedy version of it, or something.
Why do I care?
Because I do NOT like not being able to find out what something is, if I want to know the answer. It's just my nature.