136 THE TEACHING BOTANIST 



special edition with leather cover and thin paper is 

 issued for use in the field. Covering about the same 

 ground and embodying the newer classification, 

 though also embodying a system of naming of the 

 plants not yet widely accepted, is Britton and Brown's 

 " Illustrated Flora," in three volumes. This gives a 

 simple outline illustration for each species. A kind 

 of work that is very much needed, and which is sure 

 in the future to be prepared, is one that will be at 

 the same time a synopsis of classification and of nat- 

 ural history, giving the habits and marked adapta- 

 tions of each species. For the Southern States there 

 is Chapman's " Flora," and for the Rocky Mountain 

 region, Coulter's " Manual." For the Pacific slope 

 there is not yet a compact manual comparable with 

 the above-mentioned, though Greene's " Manual of 

 the Botany of the Region of San Francisco Bay," 

 and Howell's " Flora of Northwest America," partly 

 cover that region. Of reference works for such stud- 

 ies, there are many, of which Gray's " Synoptical 

 Flora of North America ' is the most important. For 

 the study of garden plants, Gray's " Field, Forest, 

 and Garden Botany," revised by Bailey, is the only 

 work. In this connection may be mentioned mono- 

 graphs of special groups, of which by far the great- 

 est, and one of the most splendid works in every 

 respect that have ever appeared, is Sargent's " Silva 

 of North America," in twelve volumes, exhaustively 



