No other common names known.
Common milkweed (Ascelpias syriaca), a member of the Apocynaceae (Dogbane Family), is a herbaceous perennial that grows to 5 feet tall and blooms in the summer with green, pink, purple, or white flowers. It is one of the main host plants of the Monarch butterfly. The caterpillars of the Monarch Butterfly feed on the leaves of the milkweed, which gives them a toxic making them distasteful to predators. More information on common milkweed on this blog post.
Common milkweed grows in open areas such as meadows, fields, roadsides, and waste places. It is native to the northern tier of the mid-west and eastern North America.
The species name of this plant means Syrian (Missouri Botanical Garden).