Don't let the common name fool you; tall green milkweed is similar in height to spider milkweed and butterfly weed, and it is dwarfed by the taller common milkweed and swamp milkweed. The pale green flowers of Asclepias hirtella form "globoid umbels" reminiscent of fireworks exploding.  Close examination of the flowers yields tinges of white and purple.  Bees and wasps are the main pollinators, but butterflies, moths, and beetles will also visit in search of nectar.  Monarch butterfly caterpillars will not be disappointed in Tall Green Milkweed as it has ample foliage when monarchs are present.