UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 207 



Contribution from the Forest Service 

 HENRY S, GRAVES, Forester 



PROFESSIONAL PAPER 



July 17, 1915. 



THE CYPRESS AND JUNIPER TREES 



OF THE ROCKY MOUNTAIN 



REGION 



By 

 GEORGE B. SUDWORTH, Dendrologist 



CONTENTS 



Scope of the Bulletin 1 



Class and Family Relationship of Cy- 

 presses and Junipers 3 



Generic Characteristics of Cypresses . . 4 

 Arizona Cypress (Cupressus arizon- 



ica Greene) 5 



Smooth Cypress (Cupressus glabra 



Sudworth) 8 



Generic Characteristics of Junipers . . 11 

 Common Juniper {Juniperus com- 



munis Linnaeus) 13 



Western Juniper (Juniperus occi- 



dentalis Hooker) 15 



Mountain Red Cedar (Juniperus 

 scopulorum Sargent) 18 



Generic Characteristics of Junipers— Con. 

 One-seed Juniper (Juniperus mono- 



sperma (Engelm.) Sargent) ... 20 

 Mountain Cedar (Juniperus sabi- 



noides (H., B. and K.) Nees) ... 23 

 Utah Juniper (Juniperus utahensis 



(Engelm.) Lemmon) 26 



Knight Juniper (Juniperus knightii 



Nelson) 26 



Big-berried Juniper (Juniperus me- 



galocarpa Sndworth) 28 



Alligator Juniper (Juniperus pachy- 



phlaeaTorrey) 30 



Drooping Juniper (Juniperus fiac- 



cida Schlechtendal) 32 



Key to Species 36 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1915 



