OF THE GENUS PINUS. 589 
19. Prxus FLEXILIS, James (1823); Sargent, Silva, xi. (1897) 
p- 35, t. 546. 
A mountain Pine, occupying a vast area on the eastward slope 
of the Rocky Mountains, extending to New Mexico, Texas, 
Arizona, &c. The herbaceous shoots, as seen in cultivated 
specimens, are terete, purplish, glabrous, or beset with glandular 
hairs, and having a single row of resin-canals in the cortex. 
The resin-canals of the leaves are described and figured as 
marginal, but they are sometimes to be found in the mesophyll. 
The endoderm-layer consists of about 30 cells; the meristele is 
circular, with an unbranched fibro-vascular bundle. The cells of 
the mesop'yll have folded walls. Stomata occur on the dorsum 
of the leaf. 
A young cone is figured in the ‘ Gardeners’ Chronicle’ (1875), 
p. 356. The male flowers are surrounded by 8-10 bracts 
(Engelmann). 
The cones at first spread horizontally, but ultimately become 
deflected. In the mature condition the scales, like those of 
P. Lambertiana, are equally thickened on both sides near the 
tip, and spread horizontally. 
This species is intermediate, in some respects, between the 
Strobus and Cembra sections, having (usually) the marginal 
resin-canals of Strobus and the nearly wingless seeds of Cembra. 
The woody core, or axis of the cone, is narrower and more 
elongate than in the European Cembra. Cotyledons 8-9. 
20. P. Batrourrana, A. Murray; Sargent, Silva, xi. (1897) 
p. 59, t. 553. 
This species occurs on the mountains of North California. 
and is remarkable for its dense tufts of foliage. The leaves are 
short, curved, three-sided, with no stomata on the dorsum, they 
have a double layer of hypoderm, marginal resin-canals, and an 
endoderm layer of about 20 cells, encircling a single bundle 
traversing a circular meristele. The mesophyll-cells are plicate. 
The male flowers, according to Sargent, have only four scales at 
the base. The cones are pendent, about 12 cent. long, elongate, 
conic, curved; apophysis rhomboid, convex ; umbo depressed, 
almost muticous. Seeds marked with violet spots. Wing of 
seed obliquely oblong, much exceeding the seed itself. (See 
Gard. Chron., March 11, 1876, p. 332.) Cotyledons 5. 
