Texas Gardening: Help Identify this Plant, 1 by graciemae

graciemae wrote:
I need help identifying this plant that is growing in my pasture. I have alpacas and there are many plants that are poisonous to them, plus I need a clean field to prevent burrs etc. from getting in their fleece. This plant is flat to the ground and spreads way out from one central root. It has a strange smell, similar but not exactly like turnips. It has little green balls as you can see where I lifted the branch up and I think they stick to socks etc., but they aren't the painful grass burrs. These are more like velcro. Need to identify. Thanks