ABSTRACT 



Rosaceous shrubs are an important component of the vast shrublands of 

 the Intermountain area. They provide forage and cover for animals, esthetic 

 beauty for man, and are of value as soil stabilizers. The general vegeta- 

 tive, floral, reproductive, hybridization, distribution and habitat, and use 

 characteristics are described and reviewed for Amelanchier alnifolia , A. 

 utahensis , Cercocarpus intricatus , C. ledifolius , C. montanus , Cowania 

 mexicana var. stansburiana , Fallugia paradoxa , Peraphyllum ramosissi- 

 mum , Purshia glandulosa , P. tridentata, and Rosa woodsii. Artificial 

 hybridization studies demonstrate the fundamental genetic compatibility in 

 the Purshia - Cowania - Fallugia group. A taxonomic key covering each taxon 

 discussed is provided. 



