Remnant undisturbed blackland prairie. White flowered form.
Lots and lots of syrphids hill-topping to this clump of milkweeds along a windy side in the road
Matelea chihuahuensis, Animas Valley on the northwest side of the Animas Mountains, southwest of Whitmire Pass, 31.756 -108.737, Hidalgo County, New Mexico, 2 Aug 2015.