214 
5-nerved, blunt, mucronulate, somewhat appressed ; stem 2 to 3 
feet high, obtusely triangular, tumid at the base ; leaves as long 
as the stem, broadly linear, very rough on the edges; achenium 
small, triquetous. Marshes and borders of lakes in the Red 
River Valley, Repides, La., (Hale); eastern Florida (Leaven- 
worth); Carrabelle, Florida. 
(D) Sub-genus DicLipium, Nees. 
54. C. speciosus, Vahl; Torrey in part. (C. Michauxianus, 
Torrey, not of Schultes.) New England to Wisconsin, and 
southward to Florida (Curtiss, N. A Plants, No. 3048) and 
Texas (C. Wright, 1849, No. 706); also in California. 
Var. SQUARROSUS, n. var. (C. ferruginescens, Boeckl.) Scales 
spreading or recurved, reddish. New Mexico (Fendler, No. 
870); St. Louis, Mo., (Engelmann); Texas (Buckley.) 
Var. PARVUS, n. var. (C. parvus, Boeekh) Low. 7 -ta,3 
inches high ; umbel very simple, generally of a single cluster of 
short terete spikelets. Cited by Boeckeler as- collected by Dr. 
Engelmann at St. Louis, and Drummond’s Collection, No. 34; 
No. 1946, C. Wright, New Mexico, answers Beeckeler’s descrip- 
tion.. 
55. C. ferax, Richard. (C. flexuosus, Vahl; C. pennatus, 
Beeckl., not Lam.) Missouri (F. Bush); Texas (Bigelow, Buckley); 
Arizona (Pringle); California (Parish, 1064); West Indies and 
widely distributed in tropical regions. For synonomy see Clarke, 
Journ. Linn. Soc., xx, p. 295. 
56. C. Engelmannii, Steud. Massachusetts (Morong) to 
Wisconsin and southward, but not often collected. 
57. C. oxycarioides, Britton,in Bull. Torr. Bot. Club; £1.,p. 
86. Valley of the lower Rio Grande (Buckley. ) 
(E) Sub-genus Mariscus, Vahl. 
* Umbel simple or capitate. 
+ Spikelets few (2 to 6), flowered. Pe 
58. C. ovularis, Torrey. Southern New York to Illinois 
and southward; westward to Arkansas and Texas. 
Var. robustus, Boeckl. Heads larger, 6 to 8 lines in diameter, 
__ on longer rays; spikelets 3 to 6-flowered. (C. Wolfii, Wood, in 
_ Bull. Torr. Bot. Club, vi., p. 72.) Illinois (Bebb; J. Wolf) ; 
