Wyoming Ecological Services
Mountain-Prairie Region

Federally Listed, Proposed & Candidate Species | Species of Concern | Migratory Birds | All Species By County



Federally Listed, Proposed and Candidate Species


Blowout Penstemon
(Penstemon haydenii)

Staus: Endangered

Blowout PenstemonPhoto Credit: FWS/Bellis


Blowout Penstemon Area Of Influence

Section 7 Range Symbol

Wyoming Area Of Influence
Blowout Penstemon

Potential Distribution in Wyoming

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Area Of Influence

Areas Of Influence (AOI) identify areas where any project located within should consider potential effects to the Threatened, Endangered, Proposed, and Candidate species and designated and proposed Critical Habitat, in reference to Section 7 of the Endangered Species Act of 1973, as amended.  AOI typically encompass larger areas than simply where the species is known to exist because of direct and indirect effects to the species and their habitat.  It is important to consider potential effects to the species and their habitat within these larger areas.  Action agencies are encouraged to refer to the Service’s Information, Planning, and Conservation System (IPAC) or contact the FWS Wyoming Ecological Services Office for additional information.  (AOI boundaries based on the best available data at time of development.  AOI will be updated as new information becomes available).

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Species Information

Blowout penstemon (Penstemon haydenii) is a perennial herb, typically 12 inches or less in height, with 6-10 groups of milky-blue to pale lavender flowers.  The plant’s current known range in Wyoming consists of the Ferris Dunes area in northwest Carbon County, where the plant is restricted to two habitat types:  steep, northwest facing slopes of active sand dunes with less than 5 percent vegetative cover; and north-facing sandy slopes on the lee side of active blowouts with 25-40 percent vegetative cover.  Known populations in Wyoming are found between 6,680-7,440 feet.  Systematic surveys are recommended in areas with sand blowout features at lower elevations (below 6,700 feet).

Blowouts are formed as strong winds deposit sands from the windward side of a dune to the leeward side and create a sparsely vegetated crater-like depression.  Threats to blowout penstemon occur when sand dunes are removed or disturbed by vehicles.  Surveys should be conducted from mid-June to early-July when flowering occurs.  Surveys should be conducted by knowledgeable botanists trained in conducting rare plant surveys.  The Service does not maintain a list of "qualified" surveyors, but we can refer those wishing to become familiar with blowout penstemon to experts who can provide training/services.
Last updated: April 10, 2015