Showy Milkweed Invasive Plant Information

Showy Milkweed has been reported in the following 22 states:

Arizona, Colorado, Idaho, Illinois, Kansas, Minnesota, Montana, Nebraska, New Mexico, Oklahoma, South Dakota, Utah, Wisconsin, Wyoming, Oregon, California, Iowa, Michigan, Nevada, North Dakota, Texas, Washington

Images of Showy Milkweed:

Information about Showy Milkweed:

The following information is licensed as Creative Commons content from Wikipedia and the USDA.
More information about Showy Milkweed may be found here, or from the US Department of Agriculture.

Asclepias speciosa is a milky-sapped perennial plant in the Dogbane Family (Apocynaceae), known commonly as the showy milkweed.

It is native to the western half of North America.
This flowering plant is a hairy, erect perennial.
The large, pointed, elongate, simple, entire leaves are arranged oppositely on stalks.
The eye-catching, hirsute, pale pink through pinkish-purple flowers occur in dense umbellate cymes. Their corollas are reflexed and the central flower parts, five hoods with prominent hooks, form a star shape. The fruit is a large, rough follicle filled with many flat oval seeds, each with silky hairs.
This species flowers from May through September.
Native Americans used fiber in the stems for rope, basketry, and nets. Some Native Americans believed the milky sap had medicinal qualities, however, most species of milkweed are toxic.
Asclepias speciosa is a specific Monarch butterfly food and habitat plant.

Other links with information about Showy Milkweed:

Reported Urban
Infected Regions:

Sheridan, WY