330 



<>F THK SHRUBS 



we have to roii.Oh-r. retain tin- juvenile form ; others have both forms on 

 different parts oi the \ lants ; while still oihers have only the scale leavi >. 

 The two genera above given can he sureh separated only by an examina- 

 tion of the cones. ; and small plants rarely show these. The cones of 

 Thuja are elongated with ^ to li' lapping scales, and those of Channe- 

 cyparis are nearly globular of 6 to 10 scales touehin-- edge to ed^e. All 

 these cones mature in one season and are small, always less than an 

 inch and usually ] to J inch in diameter. 



When the scale leaves appear, the branches on both genera so form as 

 to produce flat, fan-like growths. This plan of branching, called 2-ranked. 

 separates the Arborvitse from all the Junipers Juniperus and the 

 true Cypresses Cupressus. 



These plants will be found in books and nursery catalogues under the 

 names of Thuja, Thuydpsis, Biota, Cupre'ssus, Chameecyparis, and 

 IJetindspora ; but they will not all be spelled as here given. The first 

 is often spelled Thiiia and Thuya in modern books, and the last 

 Retim'spora. 



KEY BASED ON THE COXES FOR SEPARATING 

 THE DWARF FORMS OF THUJA AND CHAMJ1- 

 CYPARIS 



* Cones elongated, with elongated lapping scales, Thuja. (A.) 



A. Cone scales thin, 8-10 in number ; cones J inch long and some- 

 what pendulous. COMMON AKBOUVITJE (588) - Thuja occi- 

 dentalis. 



A. Cone scales 6-8, thickened, and having a horn-like process on 

 each. Cones nearly erect, and about an inch long. EASTERN 

 or CHINESE ARBORVIT.E (580) Thuja orientalis. 



A. Cone scales 8-10, thickened and reflexed, with 3-5 seeds under 

 each ; cones somewhat pendulous. DWARF DOLAT.RATA AKBOR- 

 VIT.E (500) Thuja (Thuyopsis) dolabrata. 



* Cones globular, of 6-12 scales, which touch edge to edge. Chama- 



cyparis. (B.) 



B. Cones about J inch in diameter, of 8-10 brown scales. HINOKI 

 RETINOSPORA Chamscyparis obtusa. 



B. Cones about 1 inch in diameter, of 10-12 brown scales. SAWARA 



KETINOSPORA Chamsecyparis pisffera. 

 B. Cones about { inch in diameter, of 8 reddish brown scales. LA w- 



sox's CYPRESS (5'.H) Chamsecyparis Lawsoniana. 

 B. Cones about } inch in diameter, of 6 glaucous-green or purplish 



scales. "WHITE CEDAR Charnaecyparis thyoides (C. sph:e- 



roidea). 



