ribs, gradually tapering to a slender, obscurely 

 nerved or nerveless beak shorter than the body, 

 the beak 4.2-6.6 mm long. Pappus double; 

 capillary bristles numerous, white, minutely 

 scabrous, 6-12 mm long." 



3. LOCAL FIELD CHARACTERS: Agoseris lackschewitzii 

 has very striking pink rays when in bud or full 

 flower. However, it is important to check the 

 maturity of the plant; the corollas of both A. 

 qlauca and A. aurantiaca may age or dry a pink 

 color. Achene shape will separate A. 

 lackschewitzii from A. aurantiaca . Achenes of A. 

 aurantiaca have abrupt edges at the top of the 

 body that form highly visible, graduated, stair- 

 steps, narrowing from the body into the beak; A. 

 lackschewitzii achenes taper gradually. The 

 leaves of A. qlauca are usually thicker, wider, 

 and more glaucous than A. lackschewitzii . 

 Additionally, A. qlauca occurs on sites that are 

 much drier and more open than where A. 

 lackschewitzii is found. 



D. GEOGRAPHICAL DISTRIBUTION 



1. RANGE: Aqoseris lackschewitzii is known from 

 eight counties (Cascade, Deerlodge, Judith Basin, 

 Madison, Meagher, Park, Silver Bow, and 

 Sweetgrass) in southwestern Montana and two 

 counties (Fremont and Lemhi) in south-central 

 Idaho. 



2. CURRENT SITES: Aqoseris lackschewitzii occurs in 

 16 locations in Montana. Populations occur in 

 Cascade, Deerlodge, Judith Basin, Madison, 

 Meagher, Park, Silver Bow, and Sweetgrass 

 counties. Current distribution of A. 

 lackschewitzii in Montana is mapped in Figure 2, 

 p. 7. 



Three-digit occurrence numbers are indicated in 

 parentheses after the site names throughout this 

 report (e.g., Jerry Creek (001)). Specific 

 location and population information on these sites 

 is in the Element Occurrence records. Part IV, p. 

 15. 



Field surveys were conducted by the senior author 

 23 July to 5 August and 13 to 17 August 1990. 

 During the current study, one new population 

 (Campfire Lake Pothole (005)), consisting of two 

 subpopulations, and one new subpopulation 



