S. argentea measurements in samples 1 and 2 differ significantly in height " • 

 at the 0.2 probability level, in crown area at the .02 probability level, and 

 in diameter at the .001 probability level. 



• . 



These data are intended only to give some shrub size characteristic on 

 two sites on the mine area. The shrubs were not aged, therefore productivity 

 on the two sites cannot be calculated. 



Mortality in S^. argentea is apparently due to drought, flooding, and fun- 

 gus. Mortality in P^. virginiana is attributable to drought, flooding, porcu- 

 pines and tent caterpillars, i 



STRUCTURE 5 







Table 42 allows comparison of the community types with respect to structure. [ 



SPECIES LISTS 



The Department of State Lands requires a complete listing of species. 

 Since plants have been collected in this study area for two years, the species 

 list can be considered complete for the proposed mining area. No doubt species 

 living in the larger study area do not appear on the list. No attempt was made 

 to list ornamentals or species not found naturally in the area. 



Plants were collected in all phases of study. Collected specimens of 

 nearly all species may be found at the DNRC in Helena. 



Two species lists have been compiled (Appendix B). One lists species al- 

 phabetically by family. The other lists species by life form. 



Hitchcock and Cronquist (1973) was used for nomenclature whenever possible. 

 Other sources used were Hitchcock et al. (1969), Hitchcock (1951), Hahn (1973), 

 Booth (1972), Van Bruggen (1976) and Booth and Wright (1959). 



74 



