Sage Creek distribution: Three known populations 

 distributed throughout the study area. 



CONSERVATION STATUS 



U.S. Fish and Wildlife Service: None 



Montana Bureau of Land Management: None 



Montana Natural Heritage Program rank: G3-S2 



HABITAT: Thlaspi parviflorum occurs in moist sagebrush grassland 

 (Artemisia tridentata vaseyana/Festuca idahoensis) on cool slopes 

 or in moist meadows (Deschampsia cespitosa-Juncus balticus) in an 

 ecotonal position between grassland and subirrigated wet meadow 

 at 7,200-7,700 ft in elevation. Common associated species 

 include Geum triflorum. Ranunculus glaberrimus. Iris 

 missouriensis , Carex praegracilis, Trifolium longipes. Polygonum 

 bistortoides and Potentilla gracilis . 



POPULATION INFORMATION: The three populations occupied 1-5 acres 

 each, but density was relatively high. Estimated population size 

 was 1,000-10,000 at the Box Spring and Little Basin Spring sites 

 and 200-500 at the head of Big Spring Gulch. Thlaspi parviflorum 

 is small and flowers very early, making it difficult to detect. 

 In addition, much of the wetlands associated habitat is on 

 private land. Consequently, there are likely to be many 

 additional sites in the study area. 



MANAGEMENT CONSIDERATIONS: Thlaspi parviflorum occurs in moist 

 grasslands or meadows, often associated with springs or streams 

 in the Sage Creek study area. Although these sites are usually 

 heavily impacted by livestock, T. parviflorum is low growing and 



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