30 PINES 



half an inch. These awn-like prickles suggested a 

 name for it, and the name Aristata, derived from the 

 Latin word arista, signifying the beard of an ear 

 of corn, was forthwith dealt out to it ; (3) the P. 

 Aristata exudes specks of white resin on its leaves, 

 and this should be a sure and easy method of differen- 

 tiating the two. While the P. Aristata is in this 

 way flecked, the P. Balfouriana is fleckless and un- 

 spotted, like saints on earth. By the non-cognoscenti, 

 these white specks have been taken for some sort of 

 Chermes' visitation, or other felted scale insect 

 affliction, but a little further examination or micro- 

 graphic investigation shows that there is nothing more 

 amiss than a leakage of resin through the stomata. 



There is yet another sure method which applies to 

 the identification of them both, besides the densely 

 crowded and appressed-to-stem leaves, and that is 

 the basal sheaths break away like a torn riband, and 

 form themselves into a rosette-shaped appearance at 

 the base of the leaf. The margins of the leaves are 

 entire, a rare characteristic in Pines. 



The first-named was discovered in 1852, and the 

 Alpine variety some ten years after, so they still — 

 especially in view of the fact that they are slow 

 growers — are rather innovations with us, but innova- 

 tions in the shape of young trees that are yearly 

 becoming less novel. 



CEMBROIDES GROUP OF NUT PINES 



P. MONOPHYLLA, EdULIS, CeMBROIDES, AND 



Parryana (or Quadrifolia) 



The trees in this group of four all hail from America, 

 all have edible seeds, and each one has a different 

 number of leaves to the cluster. From one to four 

 are all represented, and in the order of number as 

 above written. 



