36 DR. M. T. MASTERS ON THE 
The male flowers resemble those of Picea, to which genus there 
is also a resemblance in the pulvini of the leaf. It differs from 
Abies in the anthers, which are spurred at the back and open 
longitudinally. The pollen-grains are large, s}5 in. diam., 
globular, and unprovided with air-sacs. The female cones are at 
first erect, afterwards pendulous, the bracts projecting beyond 
the scales, and markedly 3-lobed at the free end. The cone- 
scales are persistent as in Picea. The seeds have no resin- 
vesicles. Cotyledons 5-7, linear, with stomata on the upper 
surface. Primordial leaves of the same form as the cotyledons, 
but only about half the length. 
The wood is remarkable for the spirally-marked tracheids that 
it contains. The leaves are grooved on the upper surface, possess 
a broken layer of hypoderm, three rows of palisade-cells, sinuous 
cells surrounding a single fibro-vascular bundle, and resin-canals 
on the under surface next to the epiderm. Stomata occur on the 
lower face only. In the var. macrocarpa the form of the leaf is 
a little different, and in the mesophyll occur large, branching, 
sclerous cells, which I have not observed in the typical form. 
In the young root I find a cortex with no exoderm, a central 
bundle, elliptical in section, with masses of xylem at the two 
ends and alternating groups of phloem. Resin-canals exist in the 
cortex close to the xylem. In the hypocotyl there is a thick 
cellular cortex, no exoderm, and no distinct endoderm. The 
bundle consists of three groups of xylem, alternating with an 
equal number of phloem-masses and surrounding a large-celled 
pith. 
The cotyledons show the midrib prominent on the upper sur- 
face, an epiderm, no hypoderm, a cellular cortex with the cells 
slightly sinuous ; a cylindric pericycle with an undivided mass of 
xylem resting upon a corresponding mass of phloem. The resin- 
canals are subepidermal. 
The species occurs in North-west America, from Vancouver’s 
Island to Southern California, extending inland to the Western 
slopes of the Rocky Mountains, and from the sea-level to an 
altitude of 10,000 feet in the mountains of Colorado (Sargent). 
