268 DAVENPORT ACADEMY OF SCIENCES. 



889. C. lupulina. 



Borders of ponds and along rivers ; frequent. 



890. C. monilc, Tuckerm. 

 Swales. Moscow, Noels. 



891. C. hystricina, Muhl. 

 Sloughs and creeks ; common. 



892. C. Pseudo-Cyperus, L., var. Americana, Hochst. 

 Borders of ponds in the Cedar River region ; infrequent. 



S93. C. squarrosa, L. 



With C. Grayii, Carey, but less frequent. Our plant is C. 

 typhinoides, Schwein. 



894. C. Shortiana, Dewey. 



Marshy soil in a ravine at Wild Cat Den. 



895. C. filiformis, L., var. latifolia, Boeckl. 

 Common. A form with narrow leaves is frequent. 



896. C. trichocarpa, Muhl. 



Margin of a pond, Little's Grove, Scott county. 



897. C. trichocarpa, Muhl., var. Deweyii, Bailey. 

 Common on banks of Mississippi River. Noels. 



898. C.fusca, All. 



Swales near Noels and Eldridge. 



899. C. stricta, Lam., var. angustata, Bailey. 

 Swales; frequent. 



900. C stricta, Lam., var. decora, Bailey. 

 Swales ; frequent. 



901. C. /ongirostris, Torr. 



Cliff near Big Rock, with Stipa spartea, Trin. Abundant 

 on Government Island. 



902. C Davisii, Schwein. & Torr. 



Low grounds ; Noels, Moscow, West Liberty. 



903. C. grisea, Wahl. 



Banks of Wapsipinicon ; infrequent. 



904. C grisea, Wahl., var. angustifolia, Boot. 

 (C amphibola, Stend.) 



Moist soil, especially rich woodlands along rivers; frequent. 



905. C. conoidea, Schkuhr. 



Low unbroken prairie near Noels ; rare. 



