This milkweed is perennial. Aphids super like it and often cover sections of the stem. It is a host for the Monarch caterpillar, Danaus plexippus (middle right). It also attracts the Queen butterfly, Danaus gilippus. It grows plentifully by the trail at the Silver Creek Fish Hatchery and is found sporadically in other locations. Tarantula hawks (middle left picture) like it too, so be careful.