THE SILVA OF COLORADO 



271 



Fig. 10. — Thick-leaved Hackberry (Celtis recticulata). X£. 



Genus 12. CERCOCARPUS, Mountain Mahogany 

 In addition to the species named below there is a shrubby Cerco- 

 carpus which has dentate leaves; very abundant on the rock ridges and 

 lower foothills east of the divide. 



ia. Tree or shrub with very small entire leaves; fruit seed-like with long plumose tail. 

 Found on the western slope of the Rocky Mountains. Cercocarpus ledifolius Nutt. 



Fig. 11. — Mountain Mahogany 

 (Cercocarpus ledifolius). Xi. 



Fig. 12. — June Berry (Amelanchier 

 alnijolia). Xj. 



