4. =Pìnus montícola=, Dougl. (MOUNTAIN-PINE.) Leaves in fives, 3 to 4 in. long, from short, overlapping, very deciduous sheaths; smooth, glaucous green. Cones 7 in. long and 1¾ in. in diameter, cylindric, smooth, obtuse, short-peduncled, resinous, with loosely overlapping, pointless scales. A large tree, 60 to 80 ft. high, resembling the White Pine, and often considered a variety of it, but the foliage is denser; Pacific coast. [Illustration: P. fléxilis.] 5. =Pìnus fléxilis=, James. (WESTERN WHITE PINE.) Leaves 2 to 3 in. long, rigid, entire, acute, densely crowded, sharp-pointed, of a rich dark green color, 5 together in lanceolate, deciduous sheaths. Cones 4 to 6 in. long and half as wide, subcylindric, tapering to the end, semipendulous, clustered. Scales thick, woody, obtuse, loose, 1¼ in. broad, yellowish brown. Seeds rather large, with rigid margins instead of wings. A handsome hardy tree from the Pacific Highlands, occasionally cultivated. It resembles the eastern White Pine, but is more compact and of a darker color. [Illustration: P. Cémbra.] 6. =Pìnus Cémbra=, L. (CEMBRA PINE. SWISS STONE-PINE.) Leaves 3 to 4 in. long, from a medium-sized deciduous sheath; triangular, rigid, slender, straight, crowded, dark green with a glaucous surface; 5 together. Cones 2½ in. by 2 in., ovate, erect, with obtuse, slightly hooked, but pointless scales. Seeds as large as peas and destitute of wings. A slow-growing, cultivated tree, 40 to 80 ft. high. Forms a regular cone; branches to the ground; Europe; hardy throughout. [Illustration: P. Tæda.] 7. =Pìnus Tæda=, L. (LOBLOLLY OR OLD-FIELD PINE.) Leaves in twos and threes, 6 to 10 in. long, with elongated, close sheaths; slender and of a light green color. Cones in pairs or solitary, lateral, 3 to 4 in. long, oblong, conical; the scales having short, rigid, straight spines. A large tree, 50 to 130 ft. high, wild from Delaware, south and west, in swamps and old fields. [Illustration: P. ponderòsa.] 8. =Pìnus ponderòsa=, Dougl. (WESTERN YELLOW OR HEAVY-WOODED PINE.) Leaves in threes, 5 to 10 in. long, from short sheaths; broad, coarse, twisted, flexible, of a deep green color; branchlets thick, reddish brown. Cones 3 to 4 in. long, ovate, reflexed, clustered on short stems. Scales long, flattened, with small, sharp, recurved prickles. A large Pacific coast species, 100 to 300 ft. high, with rather coarse-grained, hard and heavy, whitish wood, and thick, deeply furrowed bark; beginning to be cultivated east. [Illustration: P. paltústris.]