268 PARKS AND PLEASURE-GROUNDS. 



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

 the others are more or less of a light silvery 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 when well 

 exhibited is liiglily ornamental. 



PiNUS. — Group 6. Cembra. 

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

 *80. P. pai'viflora, s. tree. 83. P. Cembra humila, shrub. 



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



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



Tliis group begins the modem genus Pinus^ according to the Bota- 

 nists who have subdivided the old Linnsean genus. Only P. Cembra and 

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

 bushes. P. Cemlra 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 tlirough 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 tunber, as well as 

 an ornamental tree. 



PiNUS. — Group 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. brevifolia. 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, ha* 

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

 PiNrs. — Group 8. Pseudo- Strobus. 

 (Leaves in fives.) 

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



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



