PINACEAE 



Knobcone Pine 



Pinus attenuata Lemm. 



HABIT. A small tree 20-60 feet high and 1-2 feet in diameter 

 (max. 100 by 3 feet); open, sparse crown. 



LEAVES. In fascicles of 3; 3-7 inches long; yellow-green; 

 slender; persistent 4-5 years; basal sheath persistent. 



FLOWERS. Male orange-brown; female fascicled, purple. 



FRUIT. Short-stalked; 3-6 inches long; ovoid-conic; light 

 yellow-brown; unsymmetrical with outer basal scales pyramid- 

 ally knoblike; remaining closed and persistent many years 

 with clusters characteristically encircling stems of even small 

 trees. Seed : |4 inch long with wing 1 H inches long. 



TWIGS. Slender; smooth; orange-brown. Winter buds: Yz 

 inch, brown. 



BARK. Thin; gray-brown; low, scaly ridges. 



WOOD. Unimportant; soft and weak; used locally for fuel. 



SILVICAL CHARACTERS. Intolerant; short-lived; rapid 

 growth; wide, deep roots; reproduction aggressive, especially 

 following fire. 



HABITAT, Very dry mountain slopes to 5000 feet; pure 

 or mixed stands. 



Monterey Pine 



Pinus radiata D. Don (Pinus insignis Dougl.) 



HABIT. A handsome tree 40-100 feet high and 2-5 feet 

 in diameter; rounded, open crown; common ornamental. 



LEAVES. In fascicles of 3; 4-6 inches long; bright green; 

 slender; flexible; persistent 3 years; basal sheath persistent. 



FLOWERS. Male yellow in spikes; female, dark purple. 



FRUIT. Short-stalked; 3-7 inches long; ovoid; yellow- 

 brown; unsymmetrical with outer basal scales round, thickened 

 and domelike; remaining closed and persistent. Seed: K inch, 

 wings % inch. 



TWIGS. Slender; dark orange. Winter buds: Yz inch, brown. 



BARK. Thick; red-brown to nearly black; furrowed. 



WOOD. Unimportant in the United States; soft and weak. 



SILVICAL CHARACTERS. Moderately tolerant; short- 

 lived; rapid growth; prolific seed production. An important 

 forest tree in Australia, New Zealand, and South Africa. 



HABITAT. Dry soil (17 inches rain annually) but humid 

 air; in pure stands or mixed with Bishop pine and cypress. 



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