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Sounds like it may be Devil's Apple (also known as Apple of Sodom), which is a common but hateful weed in TX.

Here is more information on it:
http://www.depi.vic.gov.au/agriculture-and-food/pests-diseases-and-weeds/weeds/a-z-of-weeds/apple-of-sodom

Could you send in a picture of the weed in question? This would make identification of the plant easier.

If it is the one I have, it has tough, speckled leaves that grow oppisite each other and big thorns all along the stem. I cut the stem down to two or three leaves close to the ground. Being careful not to get spay on other plants around, I heavily coat the leaves with round up. You may have to do it a couple times. Eventually it works. They have strong roots that travel through the ground. The herbicide will travel through these roots to help eradicate it. I don't know the name of it but it can grow all up in the trees.

There are several it could be. If you could send me a photo of it, I will try to help you identify it.

Sounds like you have come across stinkweed, which has many other names as well--like field pennycress. However, in order to know for certain what you have, it would help if you could send in a picture of this plant to questions@gardeningknowhow.com.

I think you are talking about Hairy Bittercress

Preventing Hairy Bittercress in the Garden
This pesky weed is small enough to hide among your landscape plants. Its extensive seed expulsion means that just one or two weeds can spread quickly through the garden in spring. Early control for hairy bittergrass is essential to protect the rest of the landscape from an infestation.

Prevent invasions into turf areas by encouraging good grass growth. The weeds easily infest thin or patchy areas. Apply several inches of mulch around landscape plants to help prevent seeds from getting a foothold in your soil. You can find more information on this site under Weed Control and Identification. Hope this helps.