A. Sheaths of leaf-bundles soon shed; wood soft, pale.
SOFT PINES.
B. Needles, 5 in a bundle.
C. Cones, 5 to 8 inches long; Eastern.
White Pine.
CC. Cones, 12 to 18 inches long; Western.
Sugar Pine.
BB. Needles fewer than 5 in a bundle; Western.
Nut Pines.
AA. Sheaths of leaf-bundles not soon shed; wood hard, heavy, dark,
resinous.
HARD PINES.
B. Needles, 3 in a bundle.
C. Length of needles, 8 to 18 inches; cones, 6 to 10 inches.
Longleaf Pine.
CC. Length of needles, 6 to 9 inches; cones, 3 to 5 inches.
Loblolly Pine.
CCC. Length of needles, 3 to 5 inches; cones, 1 to 3 inches.
Pitch Pine.
BB. Needles, 2 in a bundle; Northern.
C. Length of needles, 4 to 6 inches; cones 2 inches.
Red Pine.
CC. Length of needles, 1 to 3 inches; cones, 2 to 3 inches.
Jersey Pine.
BBB. Needles, 2 or 3 in a bundle; Southern.
C. Length of needles, 3 to 5 inches; cones, 1 to 3 inches.
Shortleaf Pine.
CC. Length of needles, 8 to 12 inches; cones, 3 to 6 inches.
Cuban Pine.