Asclepias viridis is a species of milkweed, a plant in the dogbane family known by the common names green milkweed, green antelope horns and spider milkweed. The specific epithet A. viridis means green. It is native to the southcentral and southeastern United States. This milkweed is a perennial herb with alternately arranged leaves. The inflorescence is an umbel of white flowers with purplish centers. Its root system is a taproot, like that of butterfly milkweed (Asclepias tuberosa). This species grows on many types of soil. It is common in overgrazed pasture land and roadsides.