Flowers are organized alphabetically by genus and species. Hover over a photo series to control the images.
Butterfly Milkweed (Asclepias tuberosa)
To identify this one, look for a cluster of distinct orange flowers (or egg-yolk yellow flowers, if you prefer, each of which has a downward-turned "skirt." The clusters occur on top of a symmetrical plant (which can occur in bunches). I included one photo where the the flowers have wilted because it clearly shows the the stalk and leaves.