Swamp milkweed (Asclepias incarnata incarnata)

Another wildflower from the Western Minnesota prairie. If not familiar with this type of milkweed, it grows in wet areas like the name implies and the flowers smell like vanilla! It is nice in the home perennial garden but it reseeds too easily for that environment so it is hard to manage. The is one of 3 species of milkweed that the caterpillar of the Monarch butterfly will eat so very important plant here