PINACEiE \9'.i 



Branchlet systems arising at different angles, pinnae not in one 



plane. 

 Leaves with a conspicuous resin gland on back. 



Branchlets compressed, foliage bright green, leaves obtuse. 



— C, Macnahiana. 

 Branchlets four-sided, foliage glaucous, leaves acute. 

 — C. arizonica. 

 Leaves not conspicuously glandular. 

 Cones 1-1 5 in. long. 

 Leaves .J.; in. long, closely appressed, not swollen at 

 tips, cones dull glossy brown or grey. — C. semper- 

 virens. 

 Leaves ,',; in. long, appressed, swollen at the tips, cones 

 shining reddish brown.— G. inacrocarpa. 

 Cones ^-| in. long. 

 Leaves jV,--',, in. long, very fragrant. Cones obtuse, shin- 

 ing brown. — C. Goveniana. 

 Leaves ,',; in. long, acuminate, not noticeably fragrant. 

 Cones glaucous. — G. lusitanica. 



Cupressus arizonica, Greene. 

 Arizona Cypress. 



C. giiadahipensis, Sargent (not S. Watson). Red-barked Cyjiress ; 

 Ai'izona Red-barked Cyjiress. 



A tree attaining in Arizona a height of 70 ft., with a girth of 

 12 ft. Bark reddish brown, separating into long, persistent 

 flakes. Branches smooth, purplish brown, often glaucous. 

 Branchlets irregularly disposed, bipinnate, the ultimate divisions 

 quadrangular. Leaves with a disagreeable odour, grey or glau- 

 cous, in 4 ranks, closely pressed, ovate, short-pointed, o^o— iV' in. 

 long, marked on the back with a glandular resinous pit. Gones 

 globose, shortly stalked, |-| in. in diameter ; scales 6-8 with 

 prominent processes. Seeds 8-10 on each scale with a few 

 inconspicuous resin tubercles. 



This species is probably a northern form of G. lusitanica, but 

 is readily distinguished by its greyish foliage and the glandular 

 pits on the leaves exuding a whitish resin. 



It occurs wild in the mountains of Arizona and in N. Mexico 

 and was discovered in 1880 by Greene near Clifton in E. Arizona, 

 forming pure forests of considerable extent at 5,000-6,000 ft. 

 altitude. It was introduced into England in 1882 from the 

 Arnold Arboretum, and only small trees are known in this 

 country. 



