14 PINES 
North American trees refers to what has been called 
by others the Colorado variety of Ayacahuite, a 
tree growing on higher slopes, and with the natural 
resultant of sporting shorter leaves and smaller 
cones, as the P. Strobiformis. It seems rather a 
dull performance to give a Greco-Roman name to 
such a stranger, and to a variety of a tree that 
enjoys such a crisp-sounding vernacular appellation 
of its own. 
With the remark that the Lambertiana carries the 
hall-mark of its identity in the grassy green colour 
of its leaves, and that the Buonapartea or Veitchii, 
a variety of the Ayacahuite, elects to have its cone 
scales incurved rather reflexed to assert an indepen- 
dence, we approach towards the end of our dis- 
sertation on the subject of these white, soft-wood 
Pines, the Strobi Group. 
To sum up some points of difference : the P. Ayaca- 
huite must be dissociated from the P. Excelsa by the 
conspicuous down it exhibits on the twigs, a symptom 
in marked contrast to the smooth surface noticeable 
on P. Excelsa branchlets. 
From the Pinus Strobus it can be identified by its 
longer leaves and dense pubescence. We might also 
notice that whereas there is every probability of an 
abundance of cones in the vicinity of the Weymouth, 
the mighty cone of the Ayacahuite is still a rare 
sight, with us. 
For a prompt recognition of the Lambertiana, the 
colour-test observance should be relied- on. The 
bright yellow-grass-green hue of its leaves is quite 
unlike any. other colour scheme of the group. 
Before leaving the subject of the Ayacahuite, there 
is still another Pine, the P. Armandi, that may easily 
delude the more unsophisticated, in the absence of 
cone clue, into the belief.that he is sampling an 
Ayacahuite. It is written down as not belonging to 
