CYPERACEiE. 267 



small and slender ; 3 fertile spikes, long, cylindric, pendulous, 

 and densely flowered, with long stiff leaves directly under the 

 spikes, and long leaves rough on their edges towards the root ; 

 color yellowish-green ; in dense tufts, beside ponds or slow 

 streams. 



78. C. limosa, L. Marshes in Stockbridge, Becket, &c. 

 var. irrigua, Wahl. Do. 



rariflora, Wahl. Do. Becket. 

 livida, Wahl. Do. do. 



oblonga, Wahl. Do. do. 



79. C. pallescens, L. Meadows dry or moist. 



80. C. umbellata, Schk. Dry fields. 

 var. vicina, D. Do. 



D. Staminate spikes 2 or more. 



Group 13. Pistillate spikes sessile or pedunculate, and 

 sometimes staminate at their summit. 



81. C. trichocarpa, Muhl. Beside slow streams, 

 var. turbinata, D. Ponds. 



82. C. filiformis. Good. Marshes ; rush-like leaves. 



83. C. pellita, Muhl. Do. leaves flat. 



84. C. lacustris, Willd. Marshes and ponds. 



85. C. retrorsa, Schw. Pondholes. 



86. C. Schweinitzii, D. Wet places ; sandy. 



87. C. vesicaria, L. Marshes. 



88. C, ampullacea. Good. Marshes. 



89. C. bullata, Schk. Beside marshes, 

 var. cylindracect) D. Do. 



90. C. longirostris, Torrey. Light soil of banks and hedges ; 

 discovered at Sheffield, Berkshire County, and since found in 

 many other places, Westfield, Amherst, &c. 



91. C. polymorpha, Muhl. Westfield; dry fields. Most of 

 the specimens have 2 or more staminate spikes, and the summit 

 of the pistillate partially staminate. 



The species of this genus seem to have few useful properties. 

 The leaves of large species are used in Italy to bind wine-flasks, 

 and by chair-makers and coopers, as the rush and cat-tail. Loudon. 



