COMPOSITAE 191 



1. E. Carolinianus Willd. Elephant's Foot. 1°-2J° high, pubes- 

 cent : leaves basal and oauline, obovate-spatulate, petioled, orenate. — 

 Locally common in rich woods around Atherton, and along the Mis- 

 souri River bluffs between Book and Sugar Creeks. 



3. EUPATORIUM L. Thoroughwoet. 



Heads cymose-panioulate. Involucre imbricated. 



Flowers purplish. 1. E. maculatum. 



Flowers white. 



Leaves connate-perfoliate. 2. M. perfoliatum. 



Leaves petioled. 



Heads 5-flowered. 3. E. altissimum. 



Heads 10-many- flowered. 



Involuoral scales in 2-3 rows. 4. E. serotinum. 



Involucral scales in one row. 5. E. ageratoides. 



1. E. maculatum L. Joe-pye Weed. 2°-7° high : leaves in whorls 

 of 3-6, petioled, ovate- lanceolate, serrate, pubescent : inilorescenoe 

 flattish. — Abundant in rich woods. July-September. 



2. B. perfoliatum L. Boneset. 2°-6° high, hairy ; leaves opposite, 

 lanceolate, acuminate, serrate : heads 10-15-flowered. — Common in low 

 grounds throughout the northeastern part and occasional elsewhere. 

 July-September. 



3. E. altissimum L. 3°-8° high, pubescent : leaves lanceolate, taper- 

 ing to the base, serrate above, strongly 3-uerved. — Common in sunny 

 grounds. July-September. 



4. E. serotinum Michx. 3°-7° high, pubescent : leaves ovate-lan- 

 ceolate, slender-petioled, sharply serrate, 3-nerved. — Local in low 

 grounds near Sheffield, Courtney, Greenwood and Grain Valley. August- 

 September. 



5. E. ageratoides L. White Snakekoot. 1°-3° high, smoothish : 

 leaves ovate, acuminate, slender-petioled, sharply serrate. — A form with 

 strongly tomentose stem is frequent. Abundant in woods. July-Oc- 

 tober. 



4. KUHNIA L. 



Perennial herbs with alternate resinous-dotted leaves. Pappus plu- 

 mose. Anthers hardly syngenesious. 



1. K. glutiuosa EU. False Boneset. 1°-3° high, tomentulose- 

 pubescent : leaves lanceolate, sharply but remotely serrate : heads 6''-8" 

 high : outer bracts subulate-acuminate : pappus white. — Not uncommon 

 in dry soil throughout, and abundant in the southern part. July-Oc- 

 tober. 



5. LACINARIA Hill. BLAZING STAR. 



Perennial herbs from tubers, with narrow leaves, and showy spioate- 

 racemose heads. Pappus barbellate to plumose. 



Heads 15-16-flowered. 



Involucral bracts acuminate. 1. L. squarroaa intermedia. 



Involuoral bracts rounded. 2. L. scarioaa. 



