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Photo © William S. Alverson
Prairie Milkweed (Asclepias sullivantii), a Wisconsin Threatened plant, is found in moist prairies. Blooming occurs early June through early July; fruiting occurs throughout July. The optimal identification period for this species is early June through early July.
Synonyms: None
The table below provides information about the protected status - state and federal - and the rank (S and G Ranks) for Prairie Milkweed (Asclepias sullivantii). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where this species has been found to date and is not meant as a range map.
| Summary Information | |
|---|---|
| State Status | THR |
| Federal Status in Wisconsin | none |
| State Rank | S2S3 |
| Global Rank | G5 |
| Tracked by NHI | Y |
The Natural Heritage Inventory has developed scores indicating the degree to which each of Wisconsin's rare plant species is associated with a particular natural community or ecological landscape. This information is similar to that found in the Wildlife Action Plan for animals. As this is a work in progress, we welcome your suggestions and feedback.
This table lists the natural communities that are associated with Prairie Milkweed. Scores for natural community associations are: "significant" association (score=3), "moderate association" (score=2) or the species can be present but is only weakly associated with the community (score=1).
| Natural communities | score |
|---|---|
| Wet-mesic Prairie | 3 |
| Mesic Prairie | 2 |
This table lists the ecological landscape association scores for Prairie Milkweed. The scores (3=High, 2=Moderate, 1=Low, 0=None) also correspond to the map.
| Ecological landscape | score |
|---|---|
| Southeast Glacial Plains | 3 |
| Southern Lake Michigan Coastal | 2 |
| Western Coulee and Ridges | 1 |
The Endangered Resources Program has developed avoidance measures and management guidelines for plants on the Natural Heritage Working List. These are a work in progress, and we welcome your suggestions and feedback. Sources used in developing this information can be found here.
These are specific actions designed to avoid "take" (mortality) of this species.
Management guidelines are additional considerations that may help maintain or enhance habitat for this species
Click to view a larger version. Please considering donating a photo to the Natural Heritage Conservation Program for educational uses. Photo use
Photo © William S. Alverson.
Asclepias sullivantii.
Photo by Thomas Meyer, Wisconsin DNR.
Prairie milkeed occurs almost exclusively in good quality wet-mesic prairie remnants. More populations of this prairie obligate are known from the Southeast Glacial Plains than any other Ecological Landscape.
Photo by Thomas Meyer, Wisconsin DNR.
Photo by Kevin Doyle, Wisconsin DNR.
Photo © William S. Alverson.
Support for Wisconsin's rare plant information has been provided by the Division of Forestry, the Endangered Resources Fund and the Wisconsin Rare Plant Preservation Fund. To donate, visit the Natural Resources Foundation of Wisconsin [exit DNR].