23 



PI. of Mon. Co.: ''Occasionally spontaneous J" 

 C. F.: (not mentioned). PI. Buf. Vic.: "Rather rare" j 

 accidental;* Loc* Herb.: no specimens. 



Because of lack (in some cases) of careful study 

 of the fresh material, and of appreciation of the dis- 

 tinguishing characteristics of B. oompestris, rapa, and 

 iHeracea , it has been somewhat diffiofrlt to separate the 

 two former species, but this has probably been correctly 

 done finally* Specimens classed as B» oampestris have 

 been found and collected as follows :- 



Ithaca, Students' Commons (1911). 



Ithaca, west of bams of College of Agr. (1912). 



Sage Playground, tiear Case* Cr- (1912). 



7he species can hardly be called a "noxious weed" 

 in this region. 

 Diagnosis : 



The distinguishing characters seem to be well 

 given in G. M., but a^ stated with special clearness and 

 emphasis in the "Cyclopedia of Horticulture". The young 

 plants are very unlike, but fresh specimens of the fruit- 

 ing stems are much less distinctive. The clasping bases 

 of the stem-leaves distinguish these species decidedly 

 from the mustard group. 



