89 



Common names ; 



Tumble mustard. 



fall sisymbrium. 

 Distribution and habitat t 



Naturalized from Europe. Southern Canada and 

 northern U. S. "Waste places, roadsides, etc, a recent 

 immigrant, locally abundant as a pernicious weed". 



PI. Mon. Co., Sup. (1910) I "A few specimens of 

 Sisymbrium altissimum were first foimd in Rochester 

 about two years agoj now the plant is growing plentifully 

 in many parts of the city and adjacent towns." Not re- 

 ported in PI. Buf. Vic. or C. F. Loc. Herb.: South Hill, 

 near Reserroir (1906)} Ithaca Flats (1910). 



A very recent arrival in the vicinity of Ithaca 

 also, according to all available evidence; apparently 

 rather infrequent in the vicinity of Ithaca in 1911, but 

 abundant in various places in this locality in 1912. 

 In 1911, collected by the writer as follows - 



Near new bams. College of Agr. (probably only 

 two plants seen here). 



Roberts pasture, near C. U. Filter Plant 

 (one plant). 



Also seen in 1911 (one plant in each place) on 

 Turkey Hill and along road between Ithaca and Renwick. 



