Friday, June 28, 2013
Much like Asclepias purpurascens, Purple Milkweed, this species has a red vein down the middle of their leaves. The two species differ by Red Milkweed having much narrower leaves and typically paler flowers. As seen above flowers are more of a pinkish tone with paler almost white forms as well as darker sometimes bicolored forms too.
To add to this confusion I've noticed a few nurseries have started calling Swamp Milkweed, Asclepias incarnata, as Red Milkweed... they are wrong.