(1847): non Hook. et Arn. P. attenuata, Lemmon in Mining & Scientific 
Press, Jan. 16, 1862; in Garden & Forest, vol. v. p. 65 and in Erythea, 
vol. i, p. 231; Sargent, Silva N. Am. vol. xi. p. 107 (1897).—O. Sarr. 
The Pine here figured is the Knob-Cone Pine of 
western North America which extends from the valley of 
the Mackenzie River in Oregon to the southern slopes of 
the San Bernardino Mountains in California. It occurs 
in somewhat isolated localities, often in fairly lofty and 
exposed situations, where its smaller size and inferior 
appearance have given rise to the alternative name of 
Scrub Pine. A remarkable feature of the species in all 
its localities is the indefinite persistence of its tightly 
closed cones. Jepson records a limb, five and a half feet 
long, secured by him in the Santa Lucia Mountains, 
California, bearing forty-five cones ; in the Museum at 
Kew is preserved a portion of a branch, four feet long, 
from a tree grown at Bayfordbury, which carries more 
than forty cones. The seeds thus imprisoned by the 
scales retain their vitality for many years, and it has 
been said that cones never discharge their seeds until the 
tree, or a least the branch on which they are borne, dies. 
This is not always the case, for after some successive 
days of great heat cones that are four or five years old 
may open and allow their seeds to fall. Ordinarily 
however, the cones remain unopened until subjected to 
the heat resulting from a forest-fire, when the scales 
come apart and the seeds thus liberated afforest the 
devastated area. When first discovered by Hartweg 
in 1847 in the Santa Cruz Mountains, California, the 
Knob-Cone Pine was mistaken for that form of the 
Monterey Pine, P. radiata, D. Don, to which Don had 
given the name P. tuberculata, and when Gordon drew 
up his account of this tree his descri ption included along 
with it the tree which Don had named P. tuberculata. 
Lemmon, who first set matters right, proposed the name 
P. attentuata for Hartweg’s tree ; most authors, however, 
have preferred to accept the transfer of the name 
P. tuberculata to the Knob-Cone Pine. The material for 
our plate was provided by a tree in the Pinetum at Kew, 
one of a pair planted by Sir J. D. Hooker some forty years 
ago; though quite healthy and perfectly hardy these are 
sigieiaiee” as 
