(e.g., Dom 1984; exception: Hitchcock et al. 1984). However, in revisionary 

 taxonomic work, both are treated as a varieties of 5. obtusaia (Kartesz 1994). 

 The herbaria in Montana are consistent with Dom (1984) in this regards, so 

 that specimens which are labeled as S. obtusata refer to the type variety rather 

 than to the rare variety. 



C. GEOGRAPHICAL DISTRIBUTION 



1. GLOBAL RANGE: Most of United States and boreal Canada. 



2. STATE DISTRIBUTION: The only collection of 5. obtusata var. major in 

 Montana is an historical collection from Gallatin County. The collection oV'S. 

 obtusata" from the Sioux District was mistakenly treated as synonymous with 

 S. obtusata var. major and was erroneously reported in Heidel and Dueholm 

 (1995). There are no known collections from eastern or central Montana, 

 though it has been collected nearby in South Dakota (Great Plains Flora 

 Association 1977). 



3. STUDY AREA DISTRIBUTION: Five S. obtusata var. obtusata locations 

 were found on the District, but not of the rare variety. These include one area 

 on Bloom Creek, two spring-fed wetlands near the Cow Creek Campground, 

 below Fear Spring, and near Yager Butte. This taxon was also documented 

 with a voucher from a 1 992 vegetation plot on the Indian Creek Grazing 

 Allotment (Studiner 51 MONT ), and from an historic collection near Poker 

 Jim Butte which is believed to be extirpated. While it appears that this variety 

 has narrow habitat requirements and has decreased under grazing, it remains 

 widespread throughout the state, and is therefore not further treated in this 

 report. 



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