5°4 



THE BOOK OF GARDENING. 



clothed with stiff green leaves. P. p. glauca (Blue Spruce) 

 (Fig. 319) is strikingly beautiful, with glaucous leaves ; in habit, 

 it is identical with the type. P. sitchensis (Picea Menziesii, 

 Abies Menziesii, A. sitchensis), , a North American species, 

 becomes a large tree of good form when planted in damp soil 

 and an open situation. Its trunk is erect, and the branches are 

 horizontal, with drooping branchlets and narrow pale green leaves, 

 glaucous on the under-sides. 



Pinus.— The genus Pinus comprises about seventy species, 

 most of which are natives of the Northern Hemisphere. Some 



are lovely trees for 

 decorative planting, and 

 those here mentioned 

 are a few of the best. 

 P. Ayacahuite, an 

 uncommon Pine, is a 

 native of Mexico, and 

 bears a slight resem- 

 blance to P. Strobus. 

 Although hardy in the 

 British Isles, it should 

 have shelter from cold 

 winds. It grows freely, 

 and forms a much- 

 branched tree, with 

 narrow glaucous leaves. 

 It is a handsome lawn 

 tree. P, Balfouriana 

 (Fox-tail Pine) is of 

 sturdy growth, com- 

 pact, and bushy. Being 

 slow in growth and of 

 medium height, it is 

 valuable for planting in 

 positions where the 

 more vigorous sorts 

 would be inadmissible. 

 Its short glaucous 

 leaves, arranged all 

 round the shoots, are 

 distinct and pleasing. 

 P. Bungeana (Lace-Bark 

 Pine) is an elegant, 

 medium-sized tree, with 

 long and rather slender branches and narrow, stiff, bright 

 green leaves. It is indigenous to North China, and very 

 handsome in the landscape. P. Cembra (Swiss Stone Pine) 

 is of compact growth and very ■ attractive. It is of pyramidal 



Fig. 320. — Pinus contorta. 



