During the last few years the writer has received numerous requests to identify weeds; among them are two conspicuous, because of the of frequency in many parts of Iowa. The question seemed sufficiently important that last fall a press bulletin was sent out, describing these weeds and several others. The press bulletin was widely copied by our local papers and many responses came in. These weeds are so widely distributed in Iowa that a short account of these will be of service to Iowa farmers.
Pammel, L. H.
"Two noxious weeds.,"
Bulletin: Vol. 3
, Article 5.
Available at: https://lib.dr.iastate.edu/bulletin/vol3/iss28/5