DESCRIPTIVE MANUAL 201 



Field Sorrel {Oxalis stricta L.). 



Description. — A pale green pubescent annual or perennial ; leaves 

 compound, with evident stipules; flowers pale yellow, eymose, 1-4, 

 at length deflexed ; in fruit columnar, short-pointed. 



Distribution. — Common in fields and waste places from New Eng- 

 land to Dakota ; common in Iowa probably over the entire state. 



Extermination. — Persistent cultivation and crop rotation will 

 usually exterminate the weed. 



Fig. 116. Yellow Field Sorrel (Oxalis stricta). Common in fields, a, Trichoma 



or plant hair. 



(a drawn by Charlotte M. King. The whole plant photographed by Hart.) 



