344 PARKS AND rLEASURE-GROUXDS. 



green ; the others are more or less of a light silveiy green. The timber 

 of P. Deodara is very durable ; that of the others is of a very inferior 

 quality. The physiognomy of this group is extremely distinct, and 

 Avhen -well exhibited is highly ornamental. 



Pixos. — Group 6. Cemhra. 

 (Cones erect. Leaves in fives, sometimes in fours and sixes.) 

 •80. P. parviHura, s. tree. 83. P. Ccmbra humila, shrub. 



*81. P. Koraien.sis, 10-12 ft. 84. P. pygma>a, shrub. 



82. P. Cembra, 50-70 ft. 85. P. Peuce, 30-40 ft. 



This gioup begins the modern genus Pinus, according to the Botan 

 ists -who Iiave subdivided the old Linna?an genus. Only P. Cembra 

 and its varieties have been introduced into this country ; the latter are 

 mere buslies. P. Cembra is of an oblongated conical form, and has fiue 

 pale glaucous foliage. It is very -^videly disseminated, both in the extent 

 of surface which it covers, and of elevation through which it ranges, in 

 the mountain chains of Central Europe and Northern Asia. It thrives 

 ■well in poor soils, at considerable heights, and is a useful timber, as 

 well as an ornamental tree. 



Pcnrs. — Group 7. Strobus. 

 (Cones drooping. Leaves in fives.) 

 8G. P. excelsa, 50-100 ft 91. P. monticola, tree. 



87. P. Strobus, 50-150 feet 92. P. Ayacahuite, 100 ft. 



88. P. alba. 93. P. Lambertiaua, 200 ft 



89. P. brevifolia. 94. P. brevifolia. 



90. P. nana. 



The type of this group is P. Strobus, the Weymouth Pine. The 

 general form is pyramidal The branches of 86 are weeping ; in 87 

 they are at first ascending and then spreading. The foliage of 86 is of 

 a pale glaucous tint ; in 87. bhiish ; in 92, wliitish-green ; in 91, dark 

 glaucous ; in 93, vivid green color. The leaves of P. excelsa are above 

 6 inches long, and of the others about 5 inches. P. Lambertiana, which 

 is one of the giants of the North-west American forests, is said to attain 

 its greatest height in pure sand. P. exoclsa, a Himalayan species," lias 

 been found to grow well on poor, sandy soils in tliis country. 



Pixrs.— Group 8. Pseudo- Strobus. 

 (Leaves in fives.) 

 *95. P. Ehrenbergii, 100 ft. 98. P. oocarpa, s h, 40-50 ft 



96. P. rudis, h? 99. P. oocarpa oocarpoides, s h. 



97. ?. Hartwogii, /l? 100. P. Russelliana, h? tree. 



