38 



NORTH AMERICAN lAFXA. 



[NO. 16. 



Alice Eastwood showed mo, in the herbarium ot" tho California Acad- 

 emy of Sciences, a cone, said to have come lioni Waj^on Camp, in which 

 the bracts, except a few at the base, are not exserted. 



Silver Pine or Mountain White Pine {Pinusmonficola). — Silver 

 pines occur here and there on Shasta, scattered among tlie Shasta tirs. 

 They were found in greatest abundance on a pumice slope south of 

 Brewer Creek Canyon, where they are the dominant trees up to an 

 altitude of 7,200 feet, and where the ground was strewn with cones of 

 the previous year — cones in which the scales are strongly retiexed. 



KiG. 2i(.— Wliitc bark pii 



In this area, along Brewer ('reek, they nu»et and .slightly overlap the 

 alpine hemlocks and white-bark pines of the zone above. They are 

 common also ou the steep lava ridges on the north side of Shasta, i)ar- 

 ticularly in the neighborhood of Jnconstance Creek and in IMud Creek 

 Canyon, especially on the west side of tlie ridge between JMud and 

 Clear creeks. A few trees occur near tlie top of Bed Cone, east of 

 Wagon Cam]). 



Lodge-Pole Pine {Pinu.s taurrayann). — The lodge-i)ole pine was 

 not found on Shasta except ou the northeast (quadrant, where Ver- 



