It doesn’t look like poison ivy to me. Fragrant sumac is more likely. People buy rhus aromatica from nurseries… Easy to tell, yellow flowers in spring, followed by red berries in autumn.

There’s an incredible variety of leaf shapes of poison ivy/oak. I’ve never seen any that looked like this specimen, but if it doesn’t bring anything else to mind to Laura735, that’s the best area to research it.

Link below with informative discussion about allergic reaction from poison oak. According to this link some people are immune but with repeated exposure over time can be susceptible to it. https://www.oregonhikers.org/forum/viewtopic.php?f=7&t=4720

I’m not an expert on the Toxicodendron genus. But with the alternate compound leaves and reddish rachis (the main axis of its compound leaflet). I’m wonder if this might be a poison oak species? According to sources, Atlantic poison oak aka Eastern poison oak (T. pubescens) is found in TX. You could take a sample to the local Agriculture Extension for verification of its correct ID to rule out poison oak. Joseph A. Carroll Building 401 W. Hickory, Ste 125 Denton, TX 76201 Click on images below link to enlarge. Best wishes! https://www.google.com/search?q=Toxicodendron+pubescens&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiKpcKaqrXOAhWCRCYKHeosBg8QiR4IhQE&biw=1867&bih=909#imgrc=_