2. =Pìcea álba=, Link. (WHITE OR SINGLE SPRUCE.) Leaves ½ to ¾ in. long, rather slender, needle-shaped, sharp-pointed, incurved, pale- or glaucous-green; branchlets smooth. Cones deciduous, 2 in. long, oblong-cylindrical, with entire, thin-edged scales. Tree 25 to 100 ft. high, of beautiful, compact, symmetrical growth when young, and such light-colored foliage as to make it a fine species for cultivation. Wild in the North, and cultivated throughout. There are varieties with bluish-green (var. _cærulea_) and with golden (var. _aurea_) foliage in cultivation. [Illustration: P. excélsa.] 3. =Pìcea excélsa=, Link. (NORWAY SPRUCE.) Leaves ¾ to 1 in. long, rigid, curved, dark green. Cones 5 to 7 in. long, and pendent at maturity, with the scales slightly incurved. A large tree, 70 to 120 ft. high, of vigorous growth, with numerous, stout, drooping branches; abundant in cultivation. A score of named varieties are sold at the nurseries, some quite dwarf, others so very irregular in shape as to be grotesque. [Illustration: P. políta.] 4. =Pìcea políta=, Carr. (TIGER'S-TAIL SPRUCE.) Leaves ½ to ¾ in. long, strong, rigid, sharp-pointed, somewhat curved, glabrous, bright green, on stout branches with prominent buds. Leaves persistent for 7 years; not 2-ranked. Cones 4 to 5 in. long, spindle-shaped elliptical, rounded at the ends. Tree of slow growth, with horizontal, yellowish-barked branches. As it is a tree of recent introduction (1865) from Japan, there are no large specimens. Hardy at Boston. [Illustration: P. púngens.] 5. =Pìcea púngens=, Eng. (SILVER SPRUCE.) Leaves ½ to 1 in. long, broad, rigid, stout, sharply acute, usually curved, pale green above, silvery-glaucous beneath, on smooth and shining branchlets. Cones very abundant, 3 to 5 in. long, cylindric, with elongated, undulated, retuse scales. A strictly conical tree with spreading branches and thick, smooth, gray bark. Sometimes cultivated; from the Rocky Mountains. Hardy. [Illustration: P. Morínda.] 6. =Pìcea Morínda=, Link. (HIMALAYAN SPRUCE.) Leaves 1 to 2 in. long, very sharply acute, pale green color, spreading, 4-sided, straight, rigid, slightly glaucous beneath; branches horizontal; branchlets remotely verticillate, numerous, drooping, with light-colored bark. Cones 6 to 7 in. long, ovate-oblong; scales light brown, oblong, entire, smooth, loosely imbricated. A tall tree, cultivated from eastern Asia and not hardy north of Washington except in sheltered positions. [Illustration: P. Alcóquina.] 7. =Pìcea Alcóquina=, Lindl. (ALCOCK'S SPRUCE.) Leaves ¼ to ¾ in. long, crowded, somewhat 4-sided, flattish, recurved, obtusely rounded at tip, deep green above, whitish or yellowish below. Cones 2 to 3 in. long, 1 in. in diameter, reddish fawn-color, with very persistent scales; scales wedge-shaped at base, rounded at tip. A large tree from Japan; fully hardy as far north as Mass. [Illustration: P. orientàlis.]