46 



does not imply the definite reference of all these forms 

 to the 3 species, hut it is hased upon the prohahility 

 that hyhridization, whether with 3 original types or a 

 slightly larger number, has been a main factor in the 

 situation. Under "Distribution* the observed distribut- 

 ion of the typical form will be given, while the aberrant 

 types will be considered under "^Bi^rlation" ; "Habitat" will 

 be considered separately at the outset* 



fo find specimens placed in the Local Herbarium, 

 consult the "General Key-List" immediately following the 

 discussion of the writer's Dentaria specimens^ /v. 4 J <v^- 



' "^ Habitat. 



Dentaria diphylla ; "In rich woods and meadows" 

 (B. M«); "Rifth woods and thickets" (6. M.); "llavines 

 and rich woods" (C. F., PI. Mon. Co.). D. laciniata t 

 "In moist or rich woods" (B. M.); "Rich damp woods" 

 (6. M.)j "Ravines, rich woods" (C. F., PI. of Mon. Co.). 

 D. maxima ! "By streams in rich woods" (6. M.). 



$he typical habitat of Dentaria has been discust 

 in comparison with that of Oardamine bulbosa ; to that 

 discussion* taken together with the statements of author- 

 ities just quoted^ there is little to add. D. diphylla 

 evidently has the widest range of adaptation, and appar- 



