730 REPORT OF STATE GEOLOGIST. 



C. anthelminticum L. Worniseed. 



(C ambrosioides anthelminticum Gray.) 

 Reported chiefly from the southern counties, but there quite 

 abundant in v\ r aste places and about streets in towns. It is of less 

 common occurrence than the preceding, with which it is often 

 confused in local collections. 



Flowers from July until October. 



Clark (Baird and Taylor); Gibson and Posey (Schneck); Jeffer- 

 son (Barnes); Vigo (Blatchley); Steuben (Bradner). 



BLITOI L. 



B. capitatum L. Strawberry Blite. 



Occurs in dry soil in the northern counties. 

 Flowers from June to August. 

 Steuben (Bradner). 



CORISPERMUM L. 



C. hyssopifolium L. Bug-seed. 



Found only on the southern shore of Lake Michigan, where it 

 is a character plant of the middle beach. 

 Flowers in August and September. 

 Lake (Hill); Porter (Cowles). 



SALSOLA L. 



S. Tragus L. Russian Thistle. 



(& Kali Tragus Moq.) 



This much dreaded weed has spread but little within our boun- 

 dary since it obtained a footing some ten years ago. It is quite 

 abundant in the northwestern corner of the State in the neigh- 

 borhood of Chicago, where there is much uncultivated land. 

 In the other counties in which it appeared, where the tillage of 

 the soil is much closer, it has made no noticeable gain. The 

 prompt recognition of its dangerous character doubtless served 

 in a large measure to prevent its spread. While a certain amount 

 of care will be needed for some time to come, the danger point, 

 so far as this species is concerned, has passed/ 



Flowers from July until September. 



Lake (Hill); Noble (Van Gorder); Wabash (Jenkins). 



