21 



Distribution an^ habitat; 



AdrentlTe or naturalized from Europe* "Noxious 

 w»ed in graln-f lelds" ; fields, roadsides, etc* 



PI* of Hon. Co*: "I'leldSf roadsides, waste places; 

 oonmon.^* PI. Buf* Vic.) listed* C* F* J 'Cultivated fields, 

 etc*" Log* Herb.: Ithaca. 

 Collected as follows: 



Alumni Field ( abundant on newly graded area, 



1911 and 1912) 

 McLean, near R* R. Sta* 

 Chicago (E* of McLean), along R* R* (some 



specimens extremely small). 

 West Hill, Ithaca, field near upper road 



toward Coy Glen. 

 Coy Glen (dead racemes, probably B* arvensis ). 

 This species has been seen rather frequently, es- 

 pecially in GUltiyated fields. It seems to need rather 

 fertile soil for vigorous growth, but the main direct 

 limiting factor seems to be the amount and character of 

 other vegetation* It is plainly intolerant of competi- 

 tion - and probably of sKade In particular. It has not 

 often been observed by the writer as a serious weed in 

 this locality, but one field at McLean appeared to be 

 badly infested* 



