Eupatorium 



COMPOSITAE 



909 



50 



Map 1989 



Eupatorium rugosum Houtt. 



o so 



Map 1990 



Eupatorium incarnatum Wal' 



been called "trembles." The plant is frequently eaten by sheep and by 

 cattle when the pasturage becomes scarce, and many of those animals 

 are killed in Indiana each year by this weed. When it is eaten by milch 

 cows, the poisonous principle (a barium salt) is communicated to the milk; 

 such milk, when consumed by people, has the same effect as the plant has 

 upon stock. The pioneers called it "milk sickness," and many of them died 

 from drinking too much of the affected milk. A pioneer informed me that 

 a family of four in my own county died from this cause. 



Indiana specimens show some variation in leaf form. All of my speci- 

 mens are generally densely short-pubescent in the inflorescence and on the 

 upper half of the stem, and in a few plants the stem is villous. (See 

 Rhodora 10: 87. 1908.) The leaves of all of my specimens are abruptly 

 cuneate at the petiole except in my Lake and Warren County specimens in 

 which they are slightly cordate at the base. 



N. B. to Nebr., southw. to Fla. and La. 



9. Eupatorium incarnatum Walt. Map 1990. I have found this species 

 in only three places in Indiana; in Harrison County, in the rather moist 

 talus of a cliff along Blue River about half a mile north of White Cloud; 

 and in Perry County, more or less frequent for a mile in moist places in the 

 roadside ditch at the base of the high, wooded bluff along the Ohio River 

 about 5 miles above Cannelton, and along the moist roadside of an aban- 

 doned road on the crest of the "German Ridge" about 6 miles east of 

 Cannelton. 



Va., s. Ind. to Mo., southw. to Fla. and Mex. 



10. Eupatorium coelestinum L. Mistflower. Map 1991. Rather infre- 

 quent in the southern half of the state. My only specimen from north- 

 ern Indiana was one which I found on the moist, north bank of Tippe- 

 canoe Lake, in Kosciusko County. It was in a habitat which suggested it was 

 native although it might have been seeded there from one of the cottages 

 on the lake, the nearest one being about 150 feet to the east. It prefers a 

 moist, hard, clay soil and is found in roadside ditches and moist places 



