11. Pìnus Austrìaca, Höss. (Austrian or Black Pine.) Leaves long, 3 to 5 in., rigid, slender, incurved, sharply mucronate, of a dark green color; from short sheaths; 2 together. Cones 2½ to 3 in. long, regularly conical, slightly recurved, of a light brown color; scales smooth, shining, with a dull spine in the center. A large cultivated tree, 60 to 80 ft. high, hardy throughout. Europe.
P. Larício.
12. Pìnus Larício, Poir. (Corsican Pine.) Leaves 4 to 6 in. long, slender, very wavy, dark green; 2 together in a sheath. Cones 2 to 3 in. long, conical, somewhat curved, often in pairs. Scales with very small prickles. Seeds rather large with broad wings. A tall, open, pyramidal, rapid-growing tree, 60 to 100 ft. high, with the branches in regular whorls, spreading and very resinous. Often cultivated. Europe.
P. Massoniàna.
13. Pìnus Massoniàna, Sieb. (Masson's Pine.) Leaves in twos, 4 to 6 in. long, rather stiff, concave on one side and convex on the other, twisted but not curved; sharp-pointed, of a fresh, bright green color. Cones 1 to 1½ in. long, conical, incurved, solitary but numerous, with closely overlapping scales terminating in slender prickles. An upright, compact tree, 40 to 50 ft. high, from Japan; sometimes cultivated. Hardy at Boston.
P. mìtis.
14. Pìnus mìtis, Michx. (Common Yellow Pine.) Leaves sometimes in threes, usually in twos, from long sheaths; slender, 3 to 5 in. long, dark green, rather soft. Cones ovate to oblong-conical, hardly 2 in. long; the scales with minute weak prickles. A large tree with an erect trunk, 50 to 100 ft. high. Staten Island, south and west. The western form has more rigid leaves, and more spiny cones.