17 



I.6.C.4. Dominance and frequency of the taxon: In 



Montana, the populations of C. lanceolata 

 var. f lava are all very extensive, and 

 consist of patchily distributed colonies. The 

 plants vary in density from sparse to locally 

 common. The greatest percent cover observed 

 was approximately 20-30%. 



I.6.C.5. Successional phenomena: The moist meadow 



habitats occupied by C. lanceolata var. flava 

 appear to be climax vegetation types, which 

 vary in condition from fair to good depending 

 on the extent of impacts from livestock 

 grazing. 



I.6.C.6. Dependence on dynamic aspects of biotic 



associations and ecosystem features: The 

 habitats occupied by C. lanceolata var. flava 

 appear to be stable, level to gently-sloping 

 montane meadows. 



I.7.B.I. Demography - known populations: Seven 



populations of C. lanceolata var. flava have 

 been located. All five populations of C. 

 lanceolata var. flava in Montana are very 

 large. The number of plants at each site was 

 roughly estimated in 1988. They range in 

 size from 10,000+ to 35,000+ individuals. 

 The populations are typically subdivided into 

 patchily distributed large colonies, spread 

 over extensive areas. The element occurrence 

 records for each of these populations are 

 included in Appendix A, pp. 32-37. 



I.7.B.2. General demographic details. 



a. Lockhart Meadows (Cheimpion Pass) 



1. Area: Numerous large colonies over 

 ca. 600 acres of extensive meadow. 



2. Number and size of plants: Ca. 

 30,000-35,000+ plants. 



3. Density: Sparse to locally common. 



4. Presence of dispersed seeds: 

 Unknown. 



5. Evidence of reproduction: Presence 

 of flowering plants. 



6. Evidence of expansion/contraction: 

 None. 



