90 



In 1912, collected as follows - 



Ithaca, Lake St., near Pall Creek. 



Renwick Park. 



Near Gascadllla Cr., Just east of Sage Playground 



( abundant on a small area, with Oapsella 



bursa-pastoris ) . 



Eyidently this species is sure to become one of the worst 



of all biennial weeds in this region, probably outranking 



Oapsella bursa-pastoris decidedly in extent of habitat - 



* 

 adaptation, as it does in size of plant. 



Diagnosis and variation: 



Leaves long, densely hirsute, narrowly pinnately 

 parted; upper leaf-segments^and capsules, extremely long 

 and slender. Sheets 1-3 and 5-8 (all from third 

 locality above ^ suggest the existence of slender early 

 and stout large-leaved later types. 



42. Sisymbrium canesoens Nutt. 

 Scientific name; 



Erysimum pinna turn Walt* Fl. Garn. 

 174. 1788. 



Sisymbrium oanescens Nutt. Gen. 2: 68. 1818. 



Bescuraiitea pinnata Britton, Mem. Torr. 

 Club 6: 173. 1894. 



