Antelope-Horn Milkweed, a native species, has been added to the USWildflowers database (5/13/2014.) Scientific name is Asclepias viridis. It is also known as Green Antelopehorn, Spider Milkweed, and Green Milkweed. Photo below was taken in a Chickamauga Battlefield, Catoosa County, Ga on May 12, 2014. Go to the Antelope-Horn Milkweed detail page for more photos and information.