18.2 THE BOOK OF EVERGREENS. 



branch of a specimen introduced from thence to Japan under 

 the name of Tojosen Momi, which signifies ' Fir of Korai.' ' 



2. TSUCJA. THE HEMLOCK SPRUCES. 



The Hemlock Spruces have been placed by Carriere in 

 a separate genus, Tsuga. The chief distinctions upon 

 which his separation is made are the manner in which the 

 anther cells open, which is transversely instead of longitu- 

 dinally, the flat, somewhat two-ranked leaves, and the soli- 

 tary, persistent, and drooping cones. It is more convenient 

 in the present work, as well as more in accordance with 

 our accepted botanical authorities, to make both Tsitga 

 and Plcea sections of Abies. The characters by which 

 authors distinguish them as genera are employed here 

 for sections, or sub-genera, and are given on page 156. 

 The trees of this section are all of remarkably graceful 

 habit, and their foliage presents a more light and feathery 

 appearance than that of either the Spruces or the Firs. 

 The general character of the trees, as well as that of the 

 wood, is well represented in Q\\\' native Hemlock Spruce, 

 Abies Canadensis, which may be taken as the type of 

 this sub-genus. 



15, A. Brunoniana.ZiWfei/. INDIAN HE>rLocK SPRUCE. 

 Syn. A. dnmosa, Lambert ; A. decid.ua, Wallich ; A. ce- 

 droides, Griffith Tsuga Brunoniana, Carriere. Leaves, 

 mostly 1 inch long, straight, linear, flat, obtuse, deflexed 

 on the margin, obsoletely denticulate toAvards the apex, 

 light green above, and very silvery glaucous below. 

 Branches and branchlets, very numerous, drooping, and 

 slender. Cones, 1 inch long, oval, sessile and smooth; 

 with orbicular, sessile, persistent scales, and emarginate, 

 wedge-shaped, very short bracteoles. Seeds, small, 

 wedge-slri) >rd, ferruginous, with an oblong, obtuse, shin- 

 ing, membranaceous wing. 



