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 onearth. 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. MoONopHYLLA, EpULIS, 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. 
