103 [ 26 ] 
Tories, resemble the common white pine of the north, but the cones are 
** two or three times as large, not to speak of the other differences. It only 
.grows on the highest mountains of this region, of aboijt 8,000 feet eleva¬ 
tion, and attains the height of 100 to 130 feet. 
Finns macropkylla* 5 another inhabitant of the higher mountains of* 
Chihuahua, is more common than the last; like it, it closely resembles a 
well known species of the United States, P. australis , from which it dif¬ 
fers by its short cones, which have on each scale a mammillary recurved 
.tubercle, and by having the leaves not only in threes, but also in fours 
, and even in fives. It may be near P. occidentals of the interior of Mexi¬ 
co, but that has the regularly five leases in each sheath. 
Finns Chihuaknxmap 6 is the common pine of Cosihuiriachi and the 
. mountains of Chihuahua, in general at an elevation of about 7,000 feet. 
'It grows only 30 to 50 feet high, and resembles somewhat P. variabilis, 
though sufficiently distinct. Dr. Wislizenus was unable to obtain speci¬ 
mens of a fourth pine, which is said to grow on the still higher mountains 
to the west, near Jesus-Maria, hearing cones 15 or 18 inches in length. 
On the highest peaks in this region a species of Arbutus was found, 
which the inhabitants call Matronia; it is a small tree with a smooth, red , 
bark, bearing in November and December red edible berries. If it is at 
all distinct from A. Mmziesii , Pursh, of the northwest coast, which it 
closely resembles, it ought, from the color of its bark, bear the name of 
to 130 feet high. Sheaths 6 lines long, very deciduous, leaves 2 to 3^, 
* * mostly 3 inches long; cojae about 10 inches in length, very resinous. 
This species forms with Pinus strobus and Pinus jlexilis a peculiar sec- 
; fion, distinguished by their 5 leaves, and their cylindric pendulous squar- 
rose cones; the leaves of P. strobus are the most slender, concave on the 
back, and strongly serrate; those of P. strobiformis are somewhat more 
rigid, convex on the back, and slightly serrate; those of P. Jlexilis are still 
more rigid, convex on the back, and entire. 
* 5 Pinus macropkylla, n. sp., squamis turionum longe acuminatis, fim^ 
m briato laceris, squarrosis, persistentibus; vaginis elongatis, adpressis, lace* 
# ris; foliis ad apicem ramulorum congestis ternis, quaternis (rarius quinis) 
, . longissimis, margine carinaque serrulatis, utrumque aspero-striatis, sub- 
- glaucis; strobilis' ovato Conicis; sqamis tuberculo conico, apice spinifero, 
recurvo instructs; seminibus parvis, aiatis. 
| v* Common on the higher mountains of Cosihuiriachi; 70 to 80 feet high; 
sheaths 15 to 20 lines long; leaves 13 to 15 inches long in the specimens 
before me; in fours as well as in threes; rarely in fives; cone 4^ inches 
$ long. Evidently near P. australis , Mich., but well distinguished by the 
I characters enumerated. : 
2 6 Pinus Chihuahuana, n. sp., squamis turionum acuminatis, adpressis; 
vaginis adpressis, elongatis, laceris, deciduis; foliis ternis (rare quaternis) 
supra glaucis, subtus virescentibus, leviter striatis, margine tenuissime 
'serrulatis; strobilis ovatis, abbreviates; squamis transverse ovatis, iner* 
mibus. 
The common pine of the mountains of Chihuahua, at an elevation of 
about 7,000 feet; a tree of only 30 to 50 feet in height; leaves 2 to 3J 
T \ inches lqng; serrulate on the margin, but with nearly smooth striae; cone 
in the specimen before me 1J inch long. 
'Mm 
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