258 BOTANY. 
3-44’ long, squarrose by the more or less protruding thin-edged scales, the 
free part of which is rounded or more or less triangular, rarely reflexed; 
seeds 5 or 6” long, somewhat angled, with a narrow deciduous wing-rim; 
cotyledons 6-7. 
Var. @, SERRULATA.—Leaves slender, slightly and distantly serrulate, and 
as in the two following varieties, with few or scarcely any stomata on the 
back; cones of the ordinary form. 
Var. #. Macrocarpa.—Leaves slender, entire; cones cylindric, 6-8’ 
long, 24’ in diameter, the apophysis of the scales short, rounded. 
Var. y. REFLEXA.—Leaves as in last; cones ovate-cylindrical, about 4’ 
long; apophysis elongated, reflexed. 
A middle-sized tree, rarely more than 50 feet high, on the higher 
mountains of Colorado, New Mexico, and Arizona, extending to Southern 
California. Var. a was found by Dr. Rothrock on Mount Graham (783) ; 
var. y, by the same, on Santa Rita Mountain (east of Tucson) and in the 
Sanoita Valley (654 and 1001). The cone of 1001 resembles that of the 
Asiatic P. Koraiensis, or of a small P. Ayacahuite from Mexico. Var. @ was 
collected on the San Francisco Mountains by Mr. Ferdinand Bischoff in 
1871.—The species is intermediate between the true Strobi and Cembra; of 
the former it has the peripheral resin-ducts, usually 2, on the dorsal side; 
_ with the latter it has the large, almost wingless seeds in common; from 
both it is distinguished by the back of the leaf being marked by a single, 
or a few series of stomata. It thus becomes the type of a third section of 
the Strobus-like Pines, which may be arranged as follows: 
1. Cembre, with large, almost wingless seeds; dorsal face of leaves with- 
out stomata; resin-ducts of the serrulate leaves imbedded in the parenchyma; 
P.Cembra of Europe and Asia with appressed, and P. Koraiensis of Northeast- 
ern Asia with squarrose cone-scales. 2. Flexiles, with similar seeds, but entire 
or nearly entire leaves, with a few series of stomata on back, with peripheral 
ducts; P. flexilis, P. albicaulis, and the Asiatic P. pygmea. This last is thus 
entirely distinct from P. Cembra, as a variety of which it has long been 
considered by Parlatore and other botanists, while P. Mandschurica, at least 
the aments and the terminal bud. When, in the following season, the axis elongates, while the ament 
matures to a cone, this latter naturally becomes quite lateral, but we continue to designate it as sub- 
terminal, jn relation to its own, coétaneons, part of the axis. 
