258 



Pinus Ponderosa and P. Benthamiana. 



Xhe ponderosa are always erect. In the leaves of the Benthamiana, there 

 is also a slight waviness, which is absent in ponderosa. The leaves of pon- 

 derosa are hard when pressed in the hands ; those o{ Benthamiana, smooth 

 and silkv. A glance at the two trees, as they stand side by side here, 

 would convince any one that they are not identical. 



It is about twenty years since the Benthamiana was introduced in Europe, 



Pinus Ponuerosa (one-fourth natural size). 



In 1847, Mr. Hartweg was sent to California by the London Horticultural 

 Society. In July of that year, he sent home seeds of this pine and several 

 others. 



In his journal, which was published by the London Society in 1847 and 

 1848, frequent allusions were made to the P. Benthamiana. He says in 

 one place, " Some trees of this noble pine attain an enormous size : the 

 largest I measured was twenty-eight feet in circumference, and two hundred 

 and twenty feet high." 



