Plants of the Rocky Mountains—Supplement II. [332] 
R. Rep., vol. vi, Bot., p. 44, not Zucc.,* if, indeed, = is not a mere form of 
P; nlc approaching by its short cones close to P. Cembra. The large 
xilis are, as Dr. ere already cape and as Dr. Hayden 
pein en by the Indians. They are distinguished from those of 
any 0 other of our Pines bya pinldicns sharp, keeled margin, representing 
wing. 
IXUS PoNDEROSA, Dougl., is “common through all the lower valleys 
and less elevated districts of the mountains, associated W ith A. Doug- 
lasit and A, Menziesii; a most yaluable timber tree.” Fendler’s N. Mex. 
No. 831. Male aments cylindrical, several inches long. 
tora, Dougl., “is quite abundant on the crest and slopes 
ay 
or 40 feet h h, wi and tapering trun t in diameter, a 
epi eeetear wn barkfdetached in thi scales, and tot ong ut 
Suppiement II.—Revision of the Hnothere of the subsection Onagra ; 
by Dr. Excetmann. 
Prefatory Note, by A. Gray.—Nuttall, in his Genera, vee te that 
Pursh had confounded two species under @. a lbicaulis, viz., his own @, 
sohiited the specimens to G. coronopifolia, on account of their seeds, not- 
withstanding their longer capsules, over looking the other characters and 
wrongly supposing that Nuttall’s description of the seeds o . pin- 
an ifida or Bradburiana somehow belonged to @. ¢ ornopioia, which, 
1 had shown in PI. Fendlerianz, has such seeds, while tho: ai- 
Dicaulis are longer and smooth. Dr. Engelmann ‘has soos corrected 
this oversight, and in the following memorandum has established the the three 
species upon oe foundation. I greatly doubt the distinctions = 
upon the duration of the root, although @. albicaulis and 
lia =~ it not always, have the phe of being aig while 
ant of that name is one of the curious little e group of American 
pines, i ing four species: los, 2 ll and Fre- 
mont, with single (not connate, as Endlicher would have it) leaves; P. edul: gelm., 
with 2 leaves; cem , Zuce., (including P. Llaveana, Schi t Torr., 
Wap cag ae bye Im h 8 leaves; and P. Parryana, En laveana, 
‘orr. Bo we 8, t. 58) with 3-5, mostly 4 leaves, Other characters, 
. par 2 
a pristine! ly from the bracts of the young shoots, strengthen the specitic dis- 
ns. This very natural little group: is characteriz i rized by the small, almost globose 
cones. * igs 
°. f which remain attached to the scale, which, T fom. te ect, is the case 1“ wingless 
seeds of f pines ; in P. Pinea, however, the win ¢ is very distinct aad? detaches itself 
fi th i ich is li i 
the Sel in the closely gre —— 5- prea gaat ae ri, oT Parry, where 
the vee wise gree is very and of a corky substan: oe variability in 
the num elec dante in hae in -pines proves that section characters taken from 
them are aun valu 
