Help Identify this Plant

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

Its a dreaded hitchiker weed. We have tons of them in Texas, I cant tell which exactly this one is, some of them have lovely flowers, but the seeds! Grrrrr.

PS- I am fairly certain that this one turns into painful tiny stickers as it ages.

This message was edited Jan 20, 2015 7:45 PM

Thanks - I googled hitchhiker weeds and out of the many pictures didn't find anything that looked like this. I'm pulling up as much of it as it can and made the mistake yesterday of doing it without gloves and my hands still smell! It's a smell like not so great turnips! Pulled more today, but used gloves! On the bright side, the alpacas don't seem interested in eating it, but I don't want them rolling in it either! My biggest concern was the poison aspect, but if they don't eat it! The leafy branches that come out from a center root almost look like carrot tops. Some of the plants are a two foot circle - all from one root! I'm sure I won't get it all and will watch it to see if these little balls turn into burrs. Thanks again for your help. Now if I could get the smell off my hands! haha

also called goats head or decils _____

They are nasty boogers for humans and animals !

they take hold in areas that have poor dry soil.