94 



Common name t 



Field penny-cress. 



Mlthrldate mustard. 



Frenchweed. 

 Distribution and habitat: 



Naturalized from Europe; northeastern and North 

 Central States, and southern Canada. "Waste places; not 

 common, except along our northern borders, where too abund- 

 ant and called 'Frenchweed'". 



PI. Mon. Co.: rare; one station. PI. Buf. Vic: 

 "Rare"; one station. Loc. Herb.: not represented. 



Found only once by the writer (one or two plants), 

 near new greenhouses of College of Agr., a little north 

 of main headhouse. 

 Diagnosis : 



Leaves similar to those of Lepidium campestre, 

 except glabrous ; capsules similar to those of Lepidum 

 in form, but very thin and much larger. 



