958 REPORT OF STATE GEOLOGIST. 



X. Canadense Mill. Hedgehog Burweed. 



Sparingly found in the central counties of the State. First 

 collected by Dr. L. M. Underwood near Greencastle. Along the 

 banks of streams or in high, sandy soils. 



Collected in flower in September, but probably commencing 

 to bloom in August. 



Tippecanoe (Cunningham); Putnam (Underwood); Hamilton 

 and Marion (Wilson); Vigo (Blatchley). 



COMPOSITE. Thistle Family. 



VERNONIA Schreb. 



V. Noveboracen8I8 (L.) Willd. Ironweed. 



Found throughout the State, but especially abundant in the 

 southern counties. It grows in moist bottom lands in great 

 luxuriance, at times reaching a height of 12 feet. It is also found 

 in moderately dry opens and prairies. 



Flowers July to September. 



Franklin (Meyncke); Gibson and Posey (Schneck); Dearborn 

 (Collins); Jay, Delaware, Randolph, and Wayne (Phinney); Noble 

 (Van Gorder); Jefferson (J. M. Coulter); Vigo (Blatchley); De- 

 catur (Ballard); Monroe; Lake (Hill). 



V. giqantea (Walt.) Britton. Tall Ironweed. 



(V. altissima Nutt.) 



This form was first detected in Tippecanoe County by Messrs. 

 Conner and Laben in 1896. Since that time I have found the 

 species in many collections labelled V. fasciculata. I believe 

 it to be of general distribution in the northern part of the State. 

 In a general way the plant has the inflorescence and achene of 

 Noveboracensis, the involucral scales of fasciculata and leaves 

 intermediate between the two. It is found most abundantly in 

 moist soils, along streams. 



The flowering season begins late in July and continues until 

 late in September. The station in Tippecanoe County cited above 

 is the only one definitely reported. It occurs, however, in collec- 

 tions from White, Wabash, Marshall and Kosciusko. 



V. fasciculata Michx. Western Ironweed. 



This form is of very general distribution throughout the State, 

 in some cases becoming so abundant as to prove very troublesome. 

 It is found especially abundant in upland soils, and often invades 

 pastures and woodlands. 



