PLATE 11 



Fig. 1. A typical stand of limber pines (Pimis flexilis), altitiule 9000 

 feet, Pine Porest Mountains, Humboldt County, Nevada; July 1, 1909. 

 The species of birds seen most commonly in this type of environment 

 were Carpodacus cassini, Colaptes cafer collaris, Empidonax ivrighti, and 

 Nucifraga columbiana. 



Fig. 2. Veratrum calif ornicum on Duflfer Peak Meadow (Camp no. 5; 

 8400 feet altitude). Pine Forest Mountains, Humboldt County, Nevada; 

 July 11, 1909. The conifers at the left are Pimis flexilis. The brush- 

 like vegetation in the background is made up of dwarfed Populus tremu- 

 loides. This was the collecting station having the greatest number of 

 Boreal species. Junco oreganus thurheri, Penthestes gamheli gamheli, 

 Nucifraga columbiana, Zonotrichia leucophrys leucophrys, Microtus mordax, 

 Zapus princeps oregonus were all taken in the neighborhood. 



[434] 



