268 



PARKS AND PLEASURE-GROUNDS. 



foliage of the common cedar is of a dark green ; 76 of a light vivid green ; 

 the others are more or less of a Hght silvery green. The timher of P. 

 Deoda/ra is very durable ; that of the others is of a very inferior quahty. 

 The physiognomy of this group is extremely distinct, and when well 

 exhibited is liighly ornamental. 



PiNUS. — Group 6. Cembra. 

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

 *80. P. pandflora, s. tree. 83. P. Cembra hiimila, shrub. 



*81. P. Koraiensis, 10-12 ft. 84. P. pygmsea, slirub. 



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



This group begias the modern genus Pinus, according to the Bota- 

 nists who have subdivided the old Lumsean genus. Only P. Gemhra and 

 its varieties have been introduced into this country : the latter are mere 

 bushes. P. Cembra is of an oblongated conical form, and has fine pale 

 glaucous foliage. It is very widely disseminated both in the extent of 

 surface which it covers, and of elevation through wHch 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 weU as 

 an ornamental tree. 



PiNTJS. — Grroup 7. Strolus. 

 (Cones drooping. Leaves in fives.) 



86. P. excelsa, 50-100 ft. 91. P. monticola, tree. 



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

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



89. P. brevifoha. 94. P. brevifoHa. 



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 fohage of 86 is of a pale 

 glaucous tint ; in 87, bluish ; in 92, whitish-green ; in 91, dark glau- 

 cous ; and 93, vivid green colour. 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. excelsa, a Himalayan species, has 

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



PiNTJS. — Group 8. Pseudo- Strobus. 

 (Leaves in fives.) 

 *95. P. Ehrenbergii, 100 ft. 97. P. Hartwegii, h ? 



96. P. rudis, h ? 98. P. oocarpa, s 7i, 40-50 ft. 



