424 Conifera Pinus. 



inches long, with sharp recurved prickles. North-western 

 America. P. ponderosa is said to be identical with this. What 

 we have seen under this name is very near the last, but the 

 branches are slenderer and the leaves shorter, of a darker green. 



11. P. macrocdrpa, syn. P. Coulteri. A large tree with 

 beautiful glaucous foliage and immensely large cones. Leaves 

 9 to 12 inches long, rigid, sheaths long. This is a very distinct 

 and desirable species. A native of California. 



12. P. Fremontiana, syn. P. monophylla. A small slow- 

 growing tree with glaucous-green rigid curved leaves from 2 

 to 3 inches long. Cones from 2 to 3 inches long, without 

 prickles. California. 



13. P. radiata. A large tree with slender branches and 

 smooth greyish-green bark. Leaves dark green, 3 to 4 inches 

 long, slender and twisted. Cone about 6 inches long, with 

 thick woody scales. Also a native of California. 



P. australis, P. Sdbiniana, P. Jeffreyi, P. rigida, and 

 P. Tceda are North American species of this section, the first 

 two rather tender. P. Bungeana is a very distinct species 

 of recent introduction, from China. 



3. Leaves usually five in each sheath. 



14. P. excelsa. Bhotan Pine. This is perhaps the most 

 familiar of this group. It is a handsome slender tree from 60 

 to 150 feet high, with smooth pale bark and drooping branches. 

 Leaves glaucous-green, very slender and flexible, from 4 to 6 

 inches long. Cone cylindrical, pendulous, 6 to 8 inches long, 

 with broad flat smooth scales. This is the most desirable 

 species of this section as an ornamental tree, being a rapid 

 grower and freely producing its large conspicuous cones. A 

 native of the mountains of Northern India. 



15. P. Btrobus. Weymouth Pine, White Pine of the 

 Americans. This is very near the last, differing mainly in the 

 shorter less abundant foliage and shorter cones with thinner 

 scales. Although a very beautiful tree, this must cede the 

 palm to the preceding, as it is of rather loose habit. A native 

 of North-eastern America, where it attains a height of 100 to 

 150 feet. The varieties nana and alba are interesting ; the 

 latter has dense short silvery foliage. 



16. P. Cembra. Siberian Stone Pine. This species is 

 remarkable for its slow growth, close erect symmetrical habit, 



