220 BOTANY OF MICHIGAN 



Bidens cemua L. Stick-tight. Common in wet open places, especially 

 near the small lakes. 



Bidens laevis (L.) BSP. Larger bur marigold. Common in swampy 

 open places about the small lakes. 



Bidens trichosperma tenuiloba (Gray) Britton. Tall tickseed sun- 

 flower. Occasional in swampy places, especially near the small lakes. 

 "Marshes throughout the county." C. A. Davis. 



Helenium autumnale L. Sneezeweed. False sunflower. Occasional in 

 wet marshy ground, especially near the small lakes. 



Achillea millefolium L. Common yarrow. Milfoil. Common every- 

 where as a weed in dryish ground. 



Anthemis cotula L. May-weed. Dog fennel. Common along roads 

 and about dwellings. 



Chrysanthemum leucanthemum pinnatifidum Lecoq & Lamotte. Ox- 

 eye daisy. White daisy. Marguerite. Whiteweed. Occasional along 

 roads, in fields and villages. Not noticed as a bad weed. 



Chrysanthemum balsamita tanacetoides Boiss. Costmary. Mint 

 geranium. An escape from cultivation to roads and near-by fields. 

 Frequent and well established. 



Tanacetum vulgare L. Common tansy. Frequent as an escape to 

 roadsides and well established. 



Artemisia caudata Michx. Tall wormwood. On sand ridges and 

 often in sand near and on the beach of Saginaw Bay. 



Artemisia abrotanum L. Old Man. Southernwood. Noticed as per- 

 sisting in old yards, but apparently not escaping. 



Artemisia biennis Willd. Biennial wormwood. Noticed as an occa- 

 sional weed in villages and depot grounds. 



Artemisia absinthium L. Wormwood. Absinthe. Noticed as an escape 

 to roadsides near Mayville. 



Erechtites hieracifolia (L.) Raf. Fireweed. Frequent throughout in 

 moist woods and open places. The common name fireweed has also re- 

 cently been given to Epilobium angustifolium L. 



Cacalia tuber osa Nutt. Tuberous Indian plantain. Plentiful from 

 near Quanicassee to Sebewaing in Huron County and even farther east. 

 "Abundant in moist prairies in Akron and Wisner townships." C. A. 

 Davis. 



Senecio aureus L. Golden ragwort. Noticed in a wet marshy place 

 near Murphy's Lake. Probably frequent throughout. 



Senecio balsamitae Muhl. Balsam groundsel. Often very abundant 

 covering the prairie-like ground with a golden mantle in the northern 

 part of Akron Township. "Very abundant on the sandy 'islands' in the 

 prairies and along the moist slopes of dunes in Akron and Wisner town- 

 ships. The sandy islands often covered with the bright yellow blossoms 

 of this form during the last of May and early June." C. A. Davis. 



