Named for Asclepius, the Greek God of Healing, and Milkweed for the milky juice it emits, this native wildflower is loved by people, butterflies, and bees.  As you tell by the photo, butterflies love Milkweed, and it is rare not to find a host of butterflies hovering nearby.   Asclepias incarnata (Milkweed) grows to about 40 inches in sun and, although slow to emerge in spring, once it does, it grows fast, blooms for a long time, and sticks around for years.  After the flowers are long gone, the fluffy seed heads of this perennial native plant also add garden interest:  the seeds are arranged in overlapping rows inside pods that resemble okra, and when the seed pods ripen and split open, the seeds, with silky filaments attached, are blown by the wind. It's one of the most unusual seed displays I've ever seen.  Zones 3-9.  Quarts

You just don't see that many orange flowers in nature, so maybe that is why I am somewhat taken aback whenever I encounter Asclepias tuberosa (Butterfly Weed) in the wild.  It may also be because you just don't see Butterfly Weed as often as you do many other native wildflowers.   Butterfly Weed, a perennial native wildflower and member of the Milkweed family, grows from two to three feet tall in full sun, and its vivid orange flowers are just as interesting to people as they are to butterflies.  Zones 4-8.  Quarts.