29. 



APPENDIX. 



Descriptions of a Few Weeds Especially of the Iowa Weed Law. 



GRASS FAMILY ( Gramineae. ) 



We have a large number of weedy plants in this family. In 

 addition to those mentioned above, atiention may be called to 

 the sandbur, sprouting crab grass, crowfoot grass, Johnson grass, 

 chess or cheat, etc. Mention may also be made of the fact that 

 wheat, rye, barley, oats and corn belong to the same family. 



Foxtail or Piegon Grass (Setaria glauca). Annual root, a sheath and 

 part of leaf, b a spikelet with bristles and glumes and cross striated "seed". 

 c-d-e-f other views of the flower, f showing stamens and stigmas exserted ; 

 pistil and stamens enclosed by the palea. (Charlotte .M. King.) 



YELLOW FOXTAIL (Setaria glauca (L.) Beauv.) 

 An erect annual one to two and one-half feet high, flat leaves 

 bristly cylindrical spike, from one to three inches long. The 

 heads are slender and the bristles tawny yellow. The small seeds 



