ENUMERATION OF CONIFERS 261 



Var. hudsonia, Engclm. (Picea Fraseri hudsonia. Knight). Hudson F, 

 Dwarf form with dark green shorter and broader leaves. 



Var. macrocarpa, Kent. Leaves longer and cones 3-3^2 inches long. 

 Wisconsin. — Introduced before 1884 by R. Douglas. This variety forms a 

 transition to the following species. 



26. A. lasiocarpa, Nutt. (A. subalpina, Engelm.). Alpine F. Tree to 

 100 or occasionally to 150 feet tall; bark smooth and silvery-gray, fissured 

 in old trees; winter-buds small, ovoid, resinous; branchlets ashy-gray, with a 

 short rufous pubescence: leaves much crowded, directed upward and forward, 

 linear, rounded or acutish at apex, rarely emarginate, 1-1 H inches long, 

 pale bluish-green, stomatiferous above and only slightly grooved, with broad 

 pale bands beneath: cones oblong-cylindric, 23^-4 inches long, truncate or 

 depressed at apex; scales ^<l-l inch wide; bracts hidden. Alaska to Oregon, 

 Utah and northern New Mexico. — ^Introduced to Great Britain in 1863, to 

 the Eastern States in 1873. Hardy as far north as Canada. 



Var. compacta, Rehd. (A. subalpina compacta, Beiss.). A dwarf compact 

 form. — Originated about 1873. 



Var. arizonica, Lemm. {A. arizonica, Merriam). Cork F. Bark thick 

 and corky, grayish- white : leaves emarginate at apex, with bluish-white 

 bands beneath, the lower ranks pectinate, the upper ones directed forward. 

 Northern Arizona and northern New Mexico. — Introduced to Europe in 1901. 



27. A. amabilis, Forbes. Cascade F. Tree to 250 feet tall; bark silvery- 

 white or pale, at the base of old trees thick and furrowed ; winter-buds globose, 

 very resinous; branchlets gray, densely pubescent: leaves crowded, the upper 

 ranks directed forward, the lower ones spreading, pectinate below, linear, 

 often broadest above the middle, truncate or bifid at the apex, about 1 

 inch long, shining dark green above, with broad white bands beneath : cones 

 oblong, 3}^-6 inches long, purple before maturity, puberulous; scales 1-1 3<C 

 inches wide; bracts hidden. British Columbia and Alberta to Oregon. — 

 Introduced in 1830 to Great Britain. Hardy as far north as Massachusetts in 

 sheltered positions. A very handsome fir of narrow-pyramidal habit. 



28. A. grandis, Lindl. (A. Gordoniana, Carr. A. amabilis, Murr., not Forbes). 

 Great F. Tree to 300 feet tall; bark smooth, brownish, fissured into thin 

 plates and red-brown or grayish-brown at the base of old trees; winter-buds 

 ovoid, resinous; branchlets olive-green, minutely pubescent: leaves pectinate, 

 linear, rounded and bifid at apex, flexible, iMr'^^i inches long, shining dark 

 green above, with white bands beneath: cones cylindric, 2-4 inches long, 

 green; scales 3 or 4 times as long as the hidden bracts. Vancouver Island to 

 northern California, east to Montana. — Introduced in 1831 to Great Britain. 

 Hardy as far north as New York, but not very satisfactory in the Eastern 

 States. 



29. A. concolor, Lindl. & Gord. White F. Plate XXVIII. Tree to 120 



