I don't have a garden any longer but I've grown a lot of Astrantias and they are a very popular and fairly common perennial here in the UK with some wonderful new varieties available. As they thrive in partial shade with moisture rententive soil I wonder if they would do well for you in Texas.
They really are attractive though, Sunningdale particularly and I've not had the problem of that one reverting to green.
They are also excellent bee plants.
