Are you sure this vetch is trifoliate? It looks bifoliate to me. The stems appear to be winged? Lathyrus hirsutus, is the most common Lathyrus in Dallas. Lathyrus pucillus is rarer. Lathyrus hirsutus produces a very hirsute seed pod. The stems shoul be winged on L. hirsutus, but I can't verify that with these 2 photos.

^ Hmm, you might be right, maybe it is just bifoliate? I'll have to go back and recheck the leaves and if there's any seed pods yet?

The photo of the stem is bleached out, but the width seems to indicate it's winged, and the pods in the upper right corner look like they are possibly hirsute. The resolution is just a tad bit weak to say for sure. This post got me interested in seeing if there were any native Lathyrus species here in Illinois, and there are a couple beautiful species, Lathyrus palustris and Lathyrus venosus. I don't think these native sweetpeas are fragrant like Lathyrus odoratus. Im tempted to grow "Cupani's Original" again also, for the sweet fragrance Lol.

Lathyrus venosus, Veiny Pea

Seeds ordered from Prairie Moon.

Lathyrus palustris, Marsh Pea.

I can't find seeds, so I may have to collect some in late summer for next year.

"I'll have to go back and recheck the leaves and if there's any seed pods yet?"

As Jay says there are pods in your photo but it's hard to see if they're hirsute. If you go back you should see plenty. More, better focus, closer pix would help.