Found nearly throughout North Dakota, Green Milkweed occurs in southeastern Canada and from Connecticut to Montana south to Georgia and northeastern Mexico, at elevations up to 6,000 ft. Green Milkweed is perennial from its taproot. Stems are mostly solitary or in pairs, and are up to two feet tall. Leaves are usually opposite, up to four inches long, and extremely variable in shape. Plants from dry sites tend to have long narrow leaves, whereas those from moist sites are nearly round. Clusters of greenish flowers, about two inches in diameter, are held at the top of the stems. Look for Green Milkweed on dry hills or slopes in sandy or rocky native prairie or dry upland woods. The plant has been found under all grazing regimes.