THE AMERICAN BOTANIST 13 



Bntliamia graminifolia. Fragrant Golden-rod. Yel- 

 low, b-a. 



Hrigeron Philadclphiciis and annuiis. FlEabane. 

 White, b-c. 



Anaphalis margaritacea. Pearly Everlasting. White, b. 



Riidheckia hirta. Cone-flower. Yellow, dark center, c. 



Achillea millefolium. MilEoil. White, b-c. 



Anthemis arrensis. Field Mayweed. White, yellow 

 center, b-c. 



Anthemis Cotula. Common Mayweed. White, yellow 

 center, b. 



Tanacetum vnlgarc. Tansy. Yellow, b-c. 



Seiiecio aureus. Golden Ragwort. Yellow, c-b. 



Cardials arvensis. Canada Thistle. Pink-purple, b. 



Car duns odoratus. Pasture Thistle. Deep pink. a-b. 



Carduus lanccolatus. Common Thistle. Light pur- 

 ple, b. 



Carduus discolor. Field Thistle. Light purple, b. 



Centaurca nigra. Black Knafweed. Rose-purple, c-b. 



