spreading and very resinous. Often cultivated. Europe.

[Illustration: P. Massoniana.]

13. =Pinus Massoniana=, 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 11/2 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.

[Illustration: P. mitis.]

14. =Pinus mitis=, 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.

[Illustration: P. densiflora.]

15. =Pinus densiflora=, Siebold. (JAPAN PINE.) Leaves about 4 in. long,
from short, fringed, scale-like sheaths; rigid, convex above, concave
beneath and somewhat serrulate on the margin, very smooth, sharp-pointed
and crowded, shining green and somewhat glaucous; falling when one to
two years old; 2 in a sheath. Cones abundant; 1 1/2 in. long,
short-peduncled, conical, obtuse, terminal, somewhat pendent; scales
linear-oblong, woody, with a small prickle which soon falls off. A
beautiful small tree, 30 to 40 ft. high; from Japan; hardy throughout.

[Illustration: P. resinosa.]

16. =Pinus resinosa=, Ait. (RED PINE.) Leaves 5 to 6 in. long, in twos,
from long sheaths; rigid, straight, dark green. Cones 2 in. long,
ovate-conical, smooth, their scales without points, slightly thickened,
usually growing in clusters. A tall tree, 60 to 80 ft. high, with rather
smooth, reddish bark and hard light-colored wood; branchlets also having
smooth reddish bark. Pennsylvania, north and west.

[Illustration: P. inops.]

17. =Pinus inops=, Ait. (JERSEY OR SCRUB PINE.) Leaves short, 1 1/2 to 3
in. long, rigid; usually 2, rarely 3, in a short sheath. Cones solitary,
2 to 3 in. long, ovate-oblong, curved, on a short stalk. Scales tipped
with a straight, rigid spine. A small tree, 15 to 30 ft. high, growing
wild in sections where the soil is poor and sandy; having straggling
flexible branches with rough, dark bark; New Jersey, south and west.
Rarely cultivated.