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Hall's milkvetch
Astragalus hallii var. fallax
NatureServe conservation status
Global (G-rank): G4T4
State (S-rank): S1
External links
Species range
Estimate from download of data from Utah Rare Plant Database on October 21, 2024.
Geocat 6 observations: Extent of Occurrence: 11.545 km2.
Historic observations over 40 years old were not used.
Pinyon-juniper and mountain brush communities, mainly on Tertiary limestones and on Jurassic silts, at 1600 to 2230 m in Garfield (?) and Kane counties, Utah; Arizona and New Mexico.
Threats or limiting factors
The main threats are from habitat degradation due to grazing, recreation, P/J removal treatments, drought, and road maintenance.
Threats compiled using observations and notes from Utah Rare Plant Database and Utah Geospatial Resource Center GIS Data downloaded in 2024. Severity of impacts are not well known so ranges are provided where appropriate. All occurrences are within grazing allotments. Several occurrences are within masticated pinyon juniper treatment areas according to aerial imagery. Some occurrences near roads and may be impacted by continued road maintenance. Recreational use of habitat, such as foot traffic, dispersed camping and OHV related activities, may pose a threat to some populations throughout its range. As the human population grows in areas within easy access to habitat and as recreational use increases, the impacts may become substantially more significant. Drought and climate change is also a threat and likely impacting this species through out it's range (Wrobleski, 2023).
