IO52 APPENDIX. 



P. 898. Read for range of Lactuca Scariola, " in waste places. Ohio, 

 Idaho and Mont., and in ballast about the eastern seaports; not common." 



Before Lactuca Ludoviciana, insert: 



la. Lactuca virosa L. STRONG-SCENTED LETTUCE. Similar to the 

 Prickly Lettuce (Lactuca Scariola) and confused with it. Leaves oblong 

 to oblanceolate, finely irregularly denticulate, rarely slightly sinuate; 

 achenes dark-colored. L. Scariola has sinuate-pinnatifid leaves and pale 

 achenes. A common weed in waste and cultivated grounds, Me. to 

 N. Dak., Ga., Kans. 



