MINNESOTA WEEDS, SERIES III 

 Bv \Y. L. Oswald and Andrew Boss 



F 



INTRODUCTION 



The Seed Laboratory of the Division of Plant Pathology and 

 Botany has prepared four seed cases, each containing the seeds of 

 twenty-four different weeds. 1 This bulletin describes the weeds of 

 seed case Series III (see Figure i). 



Bulletins 129 and 139, describing the weeds whose seeds appear in 

 seed cases I and II. may be obtained by applying to the Office of Pub- 



Fig. 1. Minnesota Weed Seed Case §eries III 



lications, University Farm, St. Paul, Minn. A general discussion of 

 weeds appears in Bulletin 129. In these bulletins the authors have not 

 adhered to a strictly botanical terminology but have used largely the 

 language of the farm and seed trade in order to avoid confusion and 

 to make the bulletin practical for farm use. This is especially true in 

 regard to the term "seed" which is frequently used for structures 

 which are, in the strict botanical sense, fruits 



1 The s^ed cases may he obtained from the Seed Laboratory, University Farm, St. 

 Paul, Minn., at cost. Four cases, each containing twenty-four kinds of weed seeds, are 

 now available. 



