66 
564. B. cernua, L. Smaller Bur-Marigold. 
Swamps and wet places; frequent. August— September. (B ) 
Within our limits the rays are often more prominent in those forms 
growing in shaded places, and on the earlier flowers. 
565. B. chrysanthemoides, Michx. Larger Bur-Marigold. 
Swamps and wet places; common, occasionally abundant. August — 
October, — in 18S7 as late as November. 
Probably confined to the eastern portion of our district. 
566. B. beckii, Torr. Water-Marigold. 
In shallow water, Lake Calumet, 1884-’86. Desplaines river, Uni- 
versity of Chicago Herb. Near Miller’s, Ind., infrequent, August. 
Calumet river, near South Chicago, 1887, Hill! 
The lower leaves may be mistaken for those of Ranunculus aquatilis, 
L. (B.) 
GALINSOGA, Ruiz & Pavon. 
567. G. parviflora, Cav. Galinsoga. 
Chicago, August, 1886, Bastin. (B. P.) 
SELENIUM, L. 
'f- 568. H. autumnale, L. Sneeze-weed. 
BanksLofstreams and wet places; common. August — September. 
DYSODIA, Cav. 
569. D. chrysanthemoides, Lag. False Dog-Fennel. 
Adventive on X. C. R. R.; common near crossing of L. S. & M. S. 
R. R.; rare near 22nd St. Station, Babcock ! 
ANTHEMIS, L. 
570. A. cotula, D C. May-weed. Dog-Fennel. Mather. 
Maruta cotula, D C. 
Roadsides and waste grounds; abundant. July 15th— November. 
571. A. arvensis, L. Corn or Field Chamomile. 
Old and waste fields; rare. July. . (B. P.) 
Seemingly established near Evanston, and in a few places in the 
northwestern part of the county, near Palatine. 
ACHILLEA, L. 
572. A. millefolium, L. Common Yarrow or Milfoil. 
Fields, roadsides, etc.; common, occasionally abundant in the 
northern and western portions of the district. June — October. 
The rose colored form is reported from Winnetka ; frequent at River- 
side, Palatine and Maywood. 
