Well then we are entering the territory of the wild lettuce family. I don't think anyone mentioned a smell from the leaves, but a milk colored substance coming out of the stem when you break one (or not) would be a featu to look for to help narrow down what you might have. Wild lettuces are a large family of plants, so finding your particular weed might be tough, but look at some pictures of them or sow thistles (not quite the same as wild lettuce but similar). Here is a link that might be useful:

>>they are soooo good!!! Yes,..it might choke you a little. These things grow like weeds here,..got several my own seedlings, early ripening, are black right now. They might soon be recognized as a super fruit, for their healthy properties. I'm always looking out for these, something out of the ordinary sweet tasting chokecherry, ..this spring I grafted one from someone claiming it's sweet,..next year I might find out. If you have a sweet tasting one, I sure would love some scion.

You can get a variety of 'cross species' crosses in the Brassica and some of the more interesting types are a direct result of one of the various '3 way' interspecific crosses possible. I've attached a link to a chart that shows them. B. Juncea (Mustard Greens) are a result of a cross of B. Nigra (black mustard) with B. Rapa (turnips, field mustard, turnip mustard). B. Napus (rhutabaga, rapeseed)a cross of B. Rapa with B. Olerica (cabagges, kales, broccoli, etc. as above. B. Carinata (Abyssinian Mustard) a cross of B. Olerica and B. Nigra. Who knows what other crosses they have had. The Brassicas are a bit "loose" with their genes... ;-) So while I'd guess what you have is a wild "turnip mustard" it could just as easily be a strange cross... You had turnips (B. Rapa) and a collard (B. Olerica) so if they crossed you could easily have gotten a new variety of Rhutabaga. I'd trial it and see if it was any good. Pretty much all the candidates are edible in one way or another... Here is a link that might be useful:

That's good to know. :) Glad you've got some tomatoes. I love the everglades one (actually I think mine is Matt's Wild), but found a yellow grape one that grows similar that I like even better because it seems to be less acidic. I love those wild type, mini, cherry tomatoes because they'll grow just about anywhere. Well that's great you'll have some tomatoes this year ... my seeds never came up and I refuse to buy any plants ... tomatoes are pretty cheap at Save a Lot. I did finally get my greek peppers up, but they are still going really slowly. A shot of the compost tea you suggested seemed to help them a lot.