270 DAVENPORT ACADEMY OF SCIENCES. 



922. C. Sarlwellii, Dewey. 

 Low places ; infrequent. 



923. C. rosea, Schkuhr. 

 Rich woods ; frequent. 



924. C. sparganioides, Muhl. 

 Rich woods ; infrequent. 



925. C. cephaloidea, Dewey. 



Low ground near Valley City, Scott county ; rare. 



926. C. cepalophora, Muhl. 

 Dry sterile soil ; frequent. 



927. C. stcrilis, Willd., var. excelsior, Bailey. 



(Bull. Torr. Club, XX, 425, (1893). "Very like C. Atlan- 



fy'ca." — Prof. Bailey.) 

 Low grass land ; Buffalo, Scott county. Abundant locally. 



928. C. interior, Bailey. 



(Bull. Torr. Club, XX, 426, (1893).) 



Swale near Eldridge, Scott county. Abundant locally. 



929. C. Muskingumensis, Schwein. 



In woods along Mississippi and Wapsipinicon Rivers ; infre- 

 quent. 



930. C- tribuloides, Wahl. 

 Low ground ; frequent. 



931. C. tribuloides, Wahl., var. cristata, Bailey. 

 Moist ground ; rather common 



932. C. scoparia, Schkuhr. 

 Low ground ; frequent. 



933- Cfoenea, Willd. 



Dry grass land near Eldridge. " Very like C. silieea." — 

 Prof. Bailey. 



934. Cfoenea, Willd., var. pcrplexa, Bailey. 



Swales near Noels and Buffalo ; on a dry wooded hillside 

 near Big Rock. Rare. 



935. C. straminea, Willd. 



Open woods along Wapsipinicon River and at Blue Grass. 



936. C. straminea, Willd., var. ?. 



Dry woods and prairies ; rather frequent. 



937. C. straminea, Willd., var. ferruginea, Bailey. 

 In a swale near Walcott, Scott county; rare. 



