SYNOPSIS OF PINES. 341 



PiNUS. — Groups. Abies, ^nd\.; Picea, Loud.; — Silver Firs. 

 (CoDes axillary and upright. Leaves solitary, flat, silvery beneath.) 



6. P. bracteata, 120 ft *19. P. firnia, tree. 



7. P. nobUis, large tree. *20. P. homolepis, 20-30 ft. 



8. P. Fraseri, 10-20 ft *2l. P. bifida. 



9. P. nana. *22. P. coucolor. 



10. P. religiosa, « k. 23. P. balsamca, 40-50 ft. 



11. P. Nordinanniana, 80 ft 24. P. amabilis, 150-200 ft 



12. P. Abies du Roi, 50-100 ft 25. P. grandis, 170-200 ft 



Ficea, Linn. Silver Fir. 26. P. lasiocarpa. 



13. P. peudula. 27. P. Pindrow, 80-100 ft 



14. P. tortuosa. 28. P. Webbiana, li? 80-100 ft 



15. P. pyramidalis. 29. P. Picbta, 60-70 ft 



16. P. foUis variegatis. 30. P. Pinsapo, GO-70 ft 



•17. P. leioclada. 'SI. P. Mertensiana. 



18. P. Cephalouica, 60 ft 



This is perhaps the riiost remarkable section in the family of Pines, in 

 respect to both the size and beauty of the trees. Their forms are gene- 

 rally pyramidal, or of the spiiy cone. P. Abies, or Silver Fir, is a trun- 

 cated pyramid, and vre believe that many of the others will approach 

 that form when they have grown long enough among us to attain to 

 their maturity. P. Pindrow and Webbiana, from the Himalayas, 

 assume a colunmar shape. P. Cephalonica, if not a broad-headed tree, 

 has such long horizontal branches as to produce a very broad cone : tho 

 same remark f.pplics to P. Pinsapo. The form and disposition of the 

 branches impart the characteristic features of this group. In 7 and 29 

 they are flat and tabulated ; ;:; 18 and 30 they are rigid, liorizontal, and 

 verticillate, giving a very symmetrical habit to the trees ; in 27 and 29 

 they are close, spreading m whoris, with drooping branchlets. The 

 foliage in 7, 18, and 30 is closely set : in 7, 8, 12, 13, 14, 15, 23, and 27 

 it is of a dark green ; in 29 of a vivid green ; in 18 and 30 of a lighter 

 vivid green ; in 11 of a light pale green ; and in 25 of a silvery green. 

 The branchlets of some sorts such as nobilis, Cephalonica, and Webbi- 

 ana, are liable to be injured by spring frosts when the trees are young ; 

 but if planted in shady places or in late situations they seldom receive 

 injury. The limber of the silver firs is generally of inferior quahty. P. 

 Cephalonica produces hartl and durable timber. Though many of thia 

 group will thrive tulera))ly on poor ground, they attain much greater 

 perfection in soils of good quality. P. Webbiana thrives in poor clay 

 soils. 



