NATIVE WOODY PLANTS OF THE UNITED STATES 
193 
A large evergreen tree; three-needled; rapid growing, especially in moist 
soil; extremely drought resistant; scarcely resistant to Hre ; seedlings, but 
not older trees, tolerant of shade; susceptible to fungus attack; wood of little 
commercial value, easily decaying; vitality of seeds transient. 
Olservdtions: California gray squirrel; of slight importance as browse for 
mule deer. 
Pinus scopulorum, see Pinus hrachyptera. 
Pinus serotina Michx. Pond pine. 
P. rigida serotina (Michx.) Loud. 
Range : 28, 29, 30. 
Site: Moist, sun. 
Fruit: Cone; some open, some remain closed after maturity. 
A large evergreen tree; commonly three-needled; rapid growing; intolerant 
of shade; wood heavy^ resinous; 56,000 seeds per pound, germination 70^90 
percent. 
Stomach records: Bob white. 
Pinus strobifcrmis Bngelm. Mexican white pine. 
Range: 11, 14. 
Site: Dry, well-drained, sun. 
Fruit : Cone ; mature in September, seeds completely shed by the middle 
of October. 
A large evergreen tree; five-needled; susceptible to blister rust; seedlings 
endure moderate shade ; wood little used commercially ; most seed produced at 
middle elevations; 2,700 seeds per pound. 
Ohservations: Much eaten by birds and squirrels. 
Pinus strobus L. Northern white pine. 
Strobus weymouthiana Opiz., S. strohus (L.) Small. 
Range : 21, 22, 23, 24, 27. 
Site: Well-drained, moist, sun, shade. 
Fruit: Cone; mature in July of the second season, seeds discharged 
in September. 
A large evergreen tree; five-needled; root system small, shallow; successful 
on sandy soils ; commonly attacked by white-pine weevil and blister rust ; wood 
of great importance commercially ; numerous varieties distinguished in cul- 
tivation ; 25,000 seeds per pound, germination 67 percent. 
Stomach records: Six species of birds, including bobwhite; white-tailed deer. 
Observations: Eight species of birds; a preferred food of red squirrel; moose, 
snowshoe hare, cottontail rabbit, casually browsed by northern white-tailed 
deer. 
Pinus taeda L. Loblolly pine. 
Range : 19, 20, 22, 25, 28, 29, 30. 
Site : Dry, well-drained, moist, sun. 
Fruit : Cone ; opens slowly, seeds shed in late fall and winter, cones 
persist a year longer. 
A large evergreen tree ; three-needled ; seedlings with a long taproot, older 
trees with a spreading root system ; not commonly found on heavy clay or 
highly siliceous soils ; rapid growing ; tolerant of shade in earlier stages, later 
much less so ; susceptible to diseases and insects ; wood not durable, valuable 
commercially; invades and reforests abandoned fields very rapidly; 13,000^ 
55,000 seeds per pound, germination 25-80 percent. 
Stomach records: Eight species of birds, including bobwhite. 
Pinus torreyana Carr. Torrey pine. 
Range : 5. 
Site : Well-drained, sun. 
Fruit : Cone ; mature in August of the third season, some seed shed in 
September, the rest remaining in the cone for several years. 
A small to large evergreen tree ; five-needled ; often low, crooked, and sprawl- 
ing in exposed situations ; apparently intolerant of shade ; wood of no impor- 
tance commercially because scarce; slow growing; 657 seeds per pound, prolific 
annual seeder ; the rarest and with the most restricted range of any American 
pine. 
Pinus tuberculata, see Pinus attenuata. 
