brevistyla may be hybridizing with A. flavescens 

 in Montana. It is imperative that specimen 

 collections be made for determination, noting 

 color while still fresh, and making morphologic 

 measurements of style length and spur length. 



Apparent hybrids between A. ionesii and A. 

 flavescens ( Aauilegia x elatior (Strickler 1991)) 

 have been observed in Glacier National Park that 

 are superficially similar to A. brevistyla 

 (DeSanto 1991, Lesica and Shelly 1991). 



D. GEOGRAPHICAL DISTRIBUTION 



1. RANGE: Aquileqia brevistyla ranges from Alaska 

 and the Yukon, south to British Columbia where it 

 is common; and to Alberta, Manitoba, Ontario, 

 Minnesota, South Dakota, Montana, and Wyoming, 

 where it is known peripherally (Hitchcock et al- 

 1964, Scoggan 1978). It is found locally in the 

 Black Hills of South Dakota (Ode 1991) . This 

 species is currently known from the mountainous 

 region of the Little Belt Mountains of central 

 Montana, with an unverified location in the 

 Absaroka Range along the Boulder River in south- 

 central Montana. 



2. CURRENT SITES: There are currently seven 

 populations that contain A. brevistyla in Montana, 

 and two populations that contain A. brevistyla and 

 what appear to be intermediates between A. 

 flavescens and A. brevistyla , as determined from 

 morphologic evidence. All of these sites occur in 

 the Judith River watershed in the northeast corner 

 of the Little Belt Mountains. 



The locations of these nine currently known, and 

 the one unverified site for A. brevistyla in 

 Montana are shown on a map. Figure 1, p. 6. The 

 legal descriptions, latitudes and longitudes, 

 elevations, USGS topographic map names, and 

 locations of the occurrences in Montana are found 

 in the Element Occurrence records, pp. 25-35. 

 Exact locations for nine of the sites are shown on 

 U.S.G.S. topographic maps pp. 36-41. 



3. HISTORICAL SITES: None known. 



4. UNVERIFIED/UNDOCUMENTED REPORTS: A specimen 

 collected in July of 1967, from 20 miles above the 

 town of McLeod (Sweetwater County) along the 

 Boulder River is unverified. The identity of the 



