258 
IOWA ACADEMY OF SCIENCE Vot. XXVIII, 1921 
Fig. 33. Lepidium perfoiiatum L,. 
recent emigrant from Europe, and so far as the writer has been 
able to learn, is not recorded in any of our manuals, except in 
Rydberg’s: Flora of the Rocky Mountains, It is a native of 
southern Europe and the Orient, the two sheets of the species in 
the writer’s herbarium being from Austria. This plant was first 
collected in Iowa by Dr. H. S. Conard of Grinnell College who 
found it growing on Hamlin Street in Grinnell in June, 1918, and 
