IQ2 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 
A large evergreen tree ; three-needled ; wood of great commercial value. 
Stomach records: Seven species of birds including California quail. Ohserva- 
tions: Four species of birds including sooty grouse; porcupine, Columbian gray 
squirrel, Sierra chickaree, California gray squirrel ; of outstanding importance 
as browse for mule deer. (Records of utilization of this species may apply 
partially to P. achy pt era.) 
Pinus pungens Lam. Mountain pine. 
Range : 25, 27. 
Site: Dry, well-drained, sun. 
Fruit: Cone; seeds shed in autumn of the second season or within 
2 or 3 years, cones persistent 18 to 20 years but seeds often sterile 
with age. 
A large evergreen tree ; two-needled ; rather slow growing ; intolerant of 
shade ; bears seed when 5 years old ; often occurs on dry, gravelly slopes but 
grows also in moist clay ; aggressive in old fields ; 40,500 seeds per pound, 
germination 60-90 percent. 
Pinus quadrifolia, see Pinus parryana. 
Pinus radiata Don. Monterey pine. 
Range : 1, 5. 
Site: Well-drained, sun. 
Fruit : Cone ; mature in August of the second season, persistent closed 
6 to 10 years, opening when heated. 
A large, often flat-topped evergreen tree ; three-needled ; occurs naturally in 
only a few scattered colonies; short-lived in arid situations; does not thrive 
in wet soils; rapid growing; somewhat tolerant of shade; prolific annual 
seeder; wood little used because scarce; humus from the species accumulates 
rapidly; tolerant of saline conditions; 20,000 seeds per pound. 
Stomach records: Two species of birds. 
Pinus remorata Mason. Santa Cruz Island pine. 
P. radiata dinata Lemmon. 
Range : 5. 
Site : Dry, well-drained, sun. 
Fruit : Cone. 
A large evergreen tree : two-needled. 
Pinus resinosa Ait. Eed pine. 
Range : 23, 24, 26, 27. 
Site : Dry, well-drained, sun. 
Fruit : Cone ; ripe in September, seeds soon shed, cones falling the 
next spring. 
A large evergreen tree ; two-needled ; rapid growing ; intolerant of shade ; 
withstands severe cold and drought; resistant to fire; much more resistant to 
insects and diseases than white pine; rarely seeds abundantly; typical of, 
but not restricted to sandy soils; prunes itself early in close stands; wood not 
durable in soil, much used commercially ; 30,000-69,000 seeds per pound, ger- 
mination 50-87 percent ; easily transplanted, 
Stomach records: One species of bird. Observations: Cottontail rabbit. 
Pinus rigida Mill, Pitch pine. 
Range: 26, 27. 
Site: Dry, well-drained, moist, sun. 
Fruit : Cone ; mature the second season, opening slowly, persistent 
several years. 
A large evergreen tree; three-needled; grows in dry, rocky, sandy, and other 
sterile soils ; coppices when cut ; rapid growing when established ; extremely 
resistant to fire; wood somewhat used commercially; 35,000-73,000 seeds per 
pound, germination 70 percent. 
Stomach records: Three species of birds including ruffed grouse; white-tailed 
deer. Observations: Seven species of birds; a preferred food of red squirrels. 
Pinus sabiniana Dougl. Digger pine. 
Range : 4. 
Site : Dry, well-drained, moist, sun. 
Fruit: Cone; mature in September of the second season, seeds shed 
during several years, cones persistent several years longer. 
