Literature of North American Systematic Hotany 67 



pretty full treatment of the plants of southern California. 



Howell's Flora of Northwest America covers pretty well 

 the Oregon, Washington and British Columbia region, with the 

 addition of some parts of Idaho. 



Frye and Riggs's Northwest Flora is a new book covering 

 the states of Washington, Oregon and portions of Idaho and 

 British Columbia. 



Piper's Flora of the State of Washington completely cov- 

 ers Washington, and is helpful for the identification of the plants 

 a little distance over the border in Oregon, Idaho, and British 

 Columbia. 



The following arrangement by states may be more helpful 

 for the western states than the more general statement given 

 above. The names of books are abbreviated in order to save 

 space. 



Western Texas: use Small as a basis, supplemented by Coul- 

 ter's Texan Flora, and Coulter and Nelson's Rocky Mountain 

 Botany. 



New Mexico: use Coulter and Nelson's Rocky Mountain 

 Botany, supplemented by Coulter's Texan Flora, Small, and 

 Rothrock's Botany in Wheeler's Reports. 



Colorado: use Coulter and Nelson's Rocky Mountain Bot- 

 any, and Rydberg's Flora. 



Wyoming: use Coulter and Nelson's Rocky Mountain 

 Botany. 



Montana: use Coulter and Nelson's Rocky Mountain 

 Botany. 



Idaho: use Coulter and Nelson's Rocky Mountain Botany 

 as a basis and supplement it with Frye and Riggs's Northwest 

 Flora, and Piper's Flora of Washington. 



Utah: use Coulter and Nelson's Rocky Mountain Botany. 



Nevada: use Coulter and Nelson's Rocky Mountain Botany 

 as a basis, and supplement it by Frye and Riggs's Northwest 

 Flora, and Watson's Botany of King's Reports. 



Arizona: use Coulter and Nelson's Rocky Mountain Botany 

 as a basis, and supplement by Coulter's Texan Flora, Abrams's 

 Los Angeles Flora, Rothrock's Botany in Wheeler's Reports, 



