Notes <>u Coniferous Seedlings 85 



stem y 2 to 1 inch long, somewhat spinulose, green. 



P. ex eels a 



b. Cotyledons and primary leaves smooth ; cotyledons 6 or 7, 



triangular in cross section, sharp pointed. 



Lari.v europea 



c. Cotyledons and primary leaves flattened, smooth ; primary 



leaves sharp pointed. Pseudotsuga 



1. Cotyledons 5 to 7, j/2 inch long, smooth, rounded 

 above, spreading, stomata more distinctly marked 

 with white above ; stem ^2 to ^J inch long, red with 

 blue-green leaves or greenish with yellow-green 

 leaves ; primary leaves flattened, sharp pointed. 



P. taxi folia 



d. Cotyledons and primary leaves more or less flattened, 



smooth, points rounded. Abies 



1. Cotyledons 5, l / 2 inch .long, stomatal markings distinct; 



stem y 2 to Y^ inch long, brownish. A. balsamea 



e. Cotyledons flattened, smooth, not sharp pointed, spread- 



ing, almost always 3, sometimes up to 6. Tsuga 



1. Primary leaves in 3's, bluish green, stomatiferous above. 



T. canadensis 

 B. Cotyledons always 2. 



I. Cotyledons flat, rounded tip, 1/3 inch long, light green, 



stomatiferous above; stem l / 2 inch long, reddish. Thuya 



a. 2 primary leaves opposite with whorls of 3 above. 



T. occidentals 



b. 4 primary leaves opposite in pairs with whorls of 3 above. 



T. gig antea 



II. Cotyledons flat, rounded tips, 1/3 inch long, dark green ; 

 leaves % inch long, in whorls of 4; stem l / 2 to % inch 

 long, reddish brown. Chamaecyparis lazvsoniana 



III. Cotyledons flat ; primary leaves in whorls of 3 or rarely 2, 

 y% inch long, rigid, sharp pointed, with a sharp midrib, 

 the stomata irregular in 4 or 5 rows. Jump cms virginidna 



