KNOB-CONE PINE 



Pinus attenuata LEMMON. 



BARK Thin, dull brown and slightly fissured and 



ridged, ridges with large loose scales. 

 LEAVES In 3's, slender and often twisted, 3 to 5 inches 



long, yellowish- or grayish-green, sparse, persisting 



on stem 4 to 5 years. 

 CONE Buff colored, strongly flexed backwards, 3 to 6 



inches long. 



The only known natural occurrence 

 of this pine in Southern California is on 

 the arid southern face of the San Ber- 

 nardino Mountains in the vicinity of the 

 great R cleared from the chaparral by 

 the students of the University of Red- 

 lands, and near City Creek. The trees 

 are dwarfish, ranging in height from 5 

 to 1 5 feet, with long sweeping branches 

 curving outward from the main stem. 

 The few trees found on the San Gabriel 

 Mountains back of Pasadena were 

 planted by the late T. P. Lukens as an 

 experiment in reforestation. A most im- 

 portant botanical discovery was made 

 by excavators at work in the La Brea 

 pits when they found cones of the Knob- 



