Tradescantia can be difficult to identify under normal situations, but especially since they do hybridize. Records that I found show that T. virginiana's range does not reach Texas. Tradescantia ohiensis and Tradescantia hirsutiflora both occur in Jefferson County ( assuming that where your are) and T. occidentalis occurs in Chambers County on the left and Cameron Parish on our right, so there is a good possibility the it is here also.
Here is an identification key, if you can get through all the scientific jargon.
http://www.efloras.org/florata...
