■ I 



longispica probably can be found in some of these 

 areas. 



E. HABITAT 



1. ASSOCIATED VEGETATION: Castilleja longispica is 

 found in the Artemisia tridentata/Festuca 

 idahoensis habitat type (Mueggler and Stewart 

 1980) and is generally rare or absent from the more 

 mesic Geranium viscosissimum phase of this habitat 

 type. Sagebrush (Artemisia tridentata ssp. 

 vaseyana) canopy cover was 10-40%. Grass cover 

 was ca. 20-60%, and dominant species included 

 Festuca idahoensis, Agropyron spicatum, Poa 

 secunda, P. pratensis , and Carex filifolia Canopy 

 cover of forbs was 20-50%; common species included 

 Astragalus miser, A. adsurgens, Arenaria congesta, 

 Potentilla gracilis, Antennaria microphylla, 

 Eriogonum umbellatum, Phlox hoodii, Balsamorhiza 

 spp., Lupinus spp. , and Cerastium arvense. Bare 

 ground usually covered 5-30%. Scattered Juniperus 

 scopulorum, Pinus flexilis , and Pseudotsuga 

 menziesii are encroaching into some sites. 



2. TOPOGRAPHY: Castilleja longispica commonly occurs 

 on nearly level flats to moderate slopes of 20- 

 40%. Although it may be found on cool slopes, C. 

 longispica most frequently occupies southeast- to 

 southwest-facing aspects. On the east front of 

 the Beartooth Mountains, C. longispica is found at 

 6,700-7,200 ft. In the Pryor Mountains it occurs 

 at 6,000-7,800 ft., occupying the lower elevations 

 on cool aspects. In the Yellowstone area C. 

 longispica has been found at 6,000-7,600 ft. 



3. SOIL AND GEOLOGICAL RELATIONSHIPS: In the 

 Beartooth Mountains, C. longispica is found on 

 soils that are derived from Madison Limestone or a 

 combination of limestone and granite-derived 

 glacial till. Castilleja longispica was found 

 only on soils derived from Madison Limestone in 

 the Pryor Mountains. In both ranges soils have a 



