THE SILVER FIRS. 155 



long, irregularly and densely two-rowed, incurved on the upper 

 side of the branches, bright green above, and glaucous below. 

 Branches, irregular on the main stem ; lateral ones numerous, 

 tolerably flat, and densely covered with leaves. Cones, erect^ 

 solitary, large, ovate-cylindrical, six inches long, and two inches 

 and a half broad, slightly tapering to both ends, and woolly 

 when young. Scales, smooth, round, and entire, an inch and a 

 quarter broad, and about the same long, and falling off when 

 the cones are ripe. Bracteas very short, and concealed by the 

 scales. Seeds, angular and soft, with a membranaceous wing. 



A magnificent tree, seen towering above all others in its 

 native forests, in Northern California, growing 200 feet high 

 on the mountains east of Fraser's River, in latitude 50°. Mr, 

 Jeffrey found it growing on the sloping sides of the mountains 

 at an elevation of 4,000 feet, with the leaves very small, dark 

 green above, and silvery beneath, with horizontal branches, 

 short and bushy, growing 250 feet high in a gravelly soil, and 

 five feet in diameter, with sixty feet of the stem without 

 branches ; the bark of the young trees is covered with large 

 blisters filled with resinous matter. 



It is quite hardy. 



No. 11. PiCEA coNCOLOR. , the Con color- Silver Fir. 



Syn. Pinus concolor, Engelmann. 

 „ Abies concolor, Lindley. 



Leaves, long, linear, flat, and much resembling those of 

 Picea grandis, but with both faces of the leaves of the same 

 colour. Cones, cylindrical. Scales, deciduous. 



A tall tree, found on the mountains of New Mexico by 

 Engelmann, of which nothing further is known. 



No. 12. PiCEA GRANDIS, Loudon, the Great Silver Fir. 

 Syn. Pinus grandis, Douglas. 

 „ Abies falcata, Rajinesque. 

 „ „ grandis, Lindley. 



Leaves, solitary, flat, linear, distinctly two-rowed, obtuse or 



