Illustrations of Conifers. 73 





KEY TO CUPRESSUS. 



I. Eu. Cupressus. Branchlets in two rows or in four irreijnlar rows. Cones large, usually 

 J to 1^ inches in diameter, attaining maturity in the second year. Seeds five to ten under 

 each scale. 



Cupressus macroearpa, Hartweg ; California. Branchlets with the tips spreading, stout. 

 Leaves tV to J inch long. Cones 1 to 1^ inches in diameter, dark reddish-brown. 

 Umbo often with decurrent horse-shoe like margin. Seeds J inch in diameter. 



Cupressus sempervirens, Linnaeus; Levant. Branchlets slender. Leaves A-. to -i 1 * inch 

 long, closely appressed. Cones about 1 inch in diameter, light brown. Umbo bluntly 

 conical not decurrent at the margins. Seeds 1 inch in diameter. 



Cupressus Goveniana, Gordon ; California. Branchlets slender. Leaves sV to iV inch 

 long. Cones J inch in diameter. Umbo forming a mucro or short hook. Seeds 

 TV to J inch in diameter. 



II, Chamaecyparis. BrancUets always in two rows, the leaves of the lateral pair flattened, of the 

 front and back pair conduplicate. Cones small, J to $ inch in diameter, ripening the first 

 year. Seeds two to five under each scale. 



A. LATERAL LEAVES ON THE OLDER BRANCHLETS LONGER THAN THE DORSI-VENTRAL LEAVES. 



Cupressus Lawsoniana, A. Murray ; Oregon and N. California. Margin of leaves indis- 

 tinctly white or uniformly green below. 



B. LATERAL LEAVES ON OLDER BRANCHLETS NOT LONGER THAN THE DOESI-VENTRAL LEAVES. 



Cupressus nootkatensis, Lambert ; Alaska, British Columbia, Washington, Oregon. 

 Branchlets horizontal or drooping, ultimate division four-angled. Leaves acute or 

 sub-acute, not glandular. Cones often glaucous. Umbo scales prominent. The 

 foliage emits a disagreeable odour when rubbed. 



Cupressus thyoides, Linnaeus ; Eastern United States. Branchlets erect, ultimate 

 divisions fan-like compressed. Leaves acute, glandular on the back. Cones 

 glaucous when young ; umbos of the scales obscure. 



