Swamp milkweed is a show-off with it clusters of rose colored flowers, it's spiky willow like leaves and and a stem just kissed with the color of wine. None of this is missed by the beautiful visitor in this photo. Milkweed varieties are beloved by butterflies and Monarch caterpillars can only feed on milkweed or they die. The swamp milkweed is listed as a wildflower and is grown in many gardens. I like it best just growing wild surrounded by other beautiful weeds.