194 



TREES OF THE NORTHERN UNITED STATES 



T. occidentalis. 



1. Thuya occidentalis, L. (AMERICAN 

 ARBOR-VITJE. WHITE CEDAR.) Leaves 

 in 4 rows on the 2-edged branchlets, hav- 

 ing a strong aromatic odor when bruised. 

 Cones oblong, % in. long, with few (6 to 

 10) pointless scales. A small tree, 20 to 

 50 ft. high, or in cultivation 1 to 50 ft. 

 high, with pale, shreddy bark, and light, 

 soft, but very durable wood. Wild north, 

 and extensively cultivated throughout 

 under more than a score of named vari- 

 eties. Their names alba, aurea, glauca, 



conica, globosa, pyramidalis, pendula, etc. 

 will give some idea of the variations in 

 color, form, etc. 



2. Thuya gigantea, Nutt. (GIANT AR- 

 BOR-VIT^E.) Leaves scale-shaped, some- 

 what 4-sided, closely overlapping, sharp- 

 pointed, slightly tuberculate on the back ; 

 cones more or less clustered and nearly y z 

 in. long. A very large and graceful tree, 

 200 ft. high, with reddish, soft wood ; from 

 the Pacific coast; introduced but not very 

 successfully grown in the Atlantic States. 



T. gigantda. 



T. dolabrata. 



3. Thuya dolabrata, L. (HATCHET- 

 LEAVED ARBOR -VIT.E.) Leaves large, 

 sometimes \^ in. long, very blunt, in 4 

 rows on the flattened spray. Cones quite 

 small, ovate, sessile, with jagged edges ; 

 scales reflexed and wedge-form. A small 

 conical tree with horizontal branches and 

 drooping branchlets ; which, because of 

 its large leaves (for an Arbor-vitae) and 

 flexible branchlets, is quite unique and 

 interesting. In shaded and moist places 

 it has done quite well as far north as 

 New York. 



4. Thuya orientalis, L. (EASTERN OR CHINESE ARBOR-VIT^:.) 

 Leaves small, in 4 opposite rows, appressed. actite, on the numer- 

 ous 2-edged branchlets. Cones large, roundish, with thick leathery 



