11 



C. SEED DISPERSAL AND BIOLOGY: A double pappus 

 of capillary bristles on the achenes of A. 

 lackschewitzii may assist in the wind 

 distribution of seeds at, or a short distance 

 from, the parent plant. Germination 

 requirements are unknown. It is not known how 

 long achenes remain viable in the soil. 



G. POPULATION ECOLOGY 



1. BIOLOGICAL INTERACTIONS 



a. COMPETITION: While no quantitative studies 

 have been done to assess interspecific 

 competition, casual field observations 

 suggest that A. lackschewitzii is moderately 

 tolerant of close neighboring meadow plants. 

 Aqoseris lackschewitzii plants usually occur 

 in close proximity to various species, but it 

 does not occur in tall, dense vegetation, in 

 thick sod-forming grasses, or in areas of 

 bare soil. 



b. HERBIVORY: Not much is known of insect or 

 mammal herbivory on A. lackschewitzii . 

 Insect holes were observed in a few leaves in 

 a population at the outlet of Campfire Lake 

 Pothole (005) , Sweetgrass County, but 

 excessive damage was not seen (pers. obs.). 

 Insects were not found within the flowering 

 or fruiting heads. 



H. LAND OWNERSHIP 



1. The U.S. Forest Service manages the land 



where 14 of the 16 populations occur. Populations 

 occurring on the individual forests are listed 

 below; exact locations are located on maps in Part 

 IV, p. 15. 



Beaverhead National Forest 

 Storm Lake (002) 

 Clover Meadows (008) 

 Harkness Lakes (016) 



Deerlodge National Forest 

 Jerry Creek (001) 

 McKelvey Lake (003) 

 Hollowtop Lake (004) 



