P. púngens.
18. Pinus púngens, Michx. f. (Table-Mountain Pine.) Leaves in twos, sometimes in threes, stout, short, 1¼ to 2½ in. long, crowded, bluish; the sheath short (very short on old foliage). Cones 3 in. or more long, hanging on for a long time; the scales armed with a stout, hooked spine, ¼ in. long. A rather small tree, 20 to 60 ft. high. New Jersey and south westward, along the mountains.
P. sylvéstris.
19. Pìnus sylvéstris, L. (Scotch Pine, wrongly called Scotch Fir.) Leaves in twos, 1½ to 2½ in. long, from short, lacerated sheaths, twisted, rigid, of a grayish or a glaucous-green color. Cones 2 to 3 in. long, ovate-conical, of a grayish-brown color, ripening the second year, the scales having 4-sided, recurved points. A large and very valuable tree of central Europe. Many varieties are in cultivation in this country. It forms the Red and Yellow Deal so extensively used for lumber in Europe.
P. contórta.
20. Pìnus contórta, Dougl. (Twisted-branched Pine.) Leaves 2 in. long, numerous, rigid, sharply mucronate, from a short, dark, overlapping sheath; 2 to a sheath. Cones from 2 to 2½ in. long, ovate, smooth, clustered. Scales furnished with a point which is soon shed. A small cultivated tree, 30 to 40 ft. high, from the Pacific coast of the United States. As it has an irregular shape, and crooked branches, it is not often planted.
P. Banksiàna.