228 Bulletin Wisconsin Natural History Society. [Vol. 5, No. 4. 
T. porrifolius L. Oyster Plant. Menomonee Valley and along 
C. & N. W. R. R. tracks near lake. Occasional. 
Taraxacum officinale Weber. T. Taraxacum (L.) Karst. Dandelion. 
Everywhere. 
Sonchus arvensis L. Corn Sow-thistle. 
Throughout county. Common. 
S. oleraceus L. Annual Sow-thistle. 
Throughout county. Common. 
S. asper (L.) All. Spiny Sow-thistle. 
Throughout county. Common. 
Lactuca scariofa var. integrata Gren. & Godr. Prickly Lettuce. 
A weed everywhere. Incorrectly referred to as L..virosa L. 
in Britton's Manual. 
L. ludoviciana (Nutt.) DC. Western Lettuce. 
Near swamp at New. Coeln. Occasional. 
L. canadensis L. Tall Lettuce. 
Throughout county. Common. 
L. canadensis L. var. integrifolia (Bigel.) Gray. L. sagittifolia Ell. 
Arrow-leaved Lettuce. 
Wauwatosa and Whitefish Bay. Not uncommon. 
L. hirsuta Muhl. Hairy Wood Lettuce. 
Wauwatosa. Occasional. 
L. pulchella (Pursh.) DC. Large-flowered Blue Lettuce. 
Near swamp at New Coeln. Bare. 
L. floridana (L.) Gaertn. False Lettuce. 
Near Milwaukee Biver above city limits. 
Hieracium venosum L. Battlesnake-weed. 
Near New Coeln and in Lake Woods. 
H. canadense Michx. Canada Hawkweed. 
Wauwatosa and Whitefish Bay. Occasional. 
H. scabrum IMichx. Bough Hawkweed. 
Wauwatosa, Oak Creek and Lake Woods. 
Prenanthes alba L. Nabulus albiis (L.) Hook. White Lettuce. 
Throughout county. Common. 
