434 TEXTBOOK OF BOTANY 



Cowles and Coulter : A Spring Flora for High Schools. American 

 Book Company. (For the north central and eastern United 

 States.) 



Dame and Brooks : Handbook of the Trees of New England. Ginn and 

 Company. 



Frye and Rigg ; Elementary Flora of the Northwest. American Book 

 Company. 



Gray : New Manual of Botany, yth edition. American Book Com- 

 pany. (For the central and northeastern United States and the 

 adjacent parts of Canada.) 



Gray and Bailey : Field, Forest, and Garden Botany. American Book 

 Company. 



Hough : Handbook of the Trees of the Northern States and Canada, East 

 of the Rocky Mountains. R. B. Hough, LowviUe, New York. 



Howell : Flora of the Northwest. J. K. GiU. and Company, Portland, 

 Oregon. 



Keeler : Our Native Trees. Charles Scribner's Sons. 



Keeler ; Our Northern Shrubs and How to Identify Them. Charles 

 Scribner's Sons. 



Lounsberry : A Guide to the Trees. Frederick A. Stokes Company. 



Mathews : Field Book of American Wild Flowers. G. P. Putnam's Sons. 



Nelson : An A nalytical Key to some of the Common Flowering Plants of 

 the Rocky Mountain Region. D. Appleton and Company. 



Nelson : Spring Flora of the Intermountain States. Ginn and Company. 



Piper and Beattie : Flora of Northwest Coast. New Era Printing Com- 

 pany. 



Sargent: Manual of the Trees of North America {exclusive of Mexico). 

 Houghton, Mifflin and Company. 



Schaffner : Field Manual of Trees. Adams Company, Columbus, Ohio. 



Small : Flora of the Southeastern United States. John K. Small, Perry 

 Ave. and 207th St., Bedford Park, New York City. 



Tracy : Flora of the Southeastern States. Ginn and Company. 



Wright : Flowers and Ferns in their Haunts. The Macmillan Company. 



Chapter XX 



Bailey: Cyclopedia of American .[griculture. 4 volumes. The Mac- 

 millan Company. 



Bailey: The Standard Cyclopedia of Horticulture. 6 volumes. The 

 Macmillan Company. 



Burkett and Poe : Cotton. Doubleday, Page and Company. 



Fraser: The Potato. Orange Judd Company. 



