137 
1180. C. muhlenbergdi, Schk. 
Frequent in dry open woods and on sandy ridges, from South Chi- 
cago, south. June — July. 
Lake shore near Kenwood. Jackson Park, 1889, culm 2 feet high; 
perigynia ovate, longer than the mucronate scale, margins rough. 
Evanston, Boltwood. 
1181. C. cephalophora, Muhl. 
Open and rich woods and old fields; common. May. (B.) 
Upper spike sometimes entirely staminate. 
1182. c, echinata, Murray, var. microstachys, Boeckl. 
C. sterilis, Willd. 
C. stellulata, L., and var. scirpoides , Gray. 
Wet places and sloughs; frequent, especially southward. May — 
June 15th. 
Common at Clarke and Miller’s, Ind., HiU/ 
1183. C. canescens, L. 
Bogs near Pine Station, Ind.; rare, 1885. (B. P.) 
1184. C. canescens, L., var. apicola, Wahl. 
C. canescens , L., var. vitilis t Carey. 
C. vitilis , Fries. 
Wet grounds. June. (B. P.) 
A tall and slender form varying in the proximity of the heads, East 
Chicago, Ind., 1889, Hill. 
1185. C. bromoides, Schk. 
Swamps of the Calumet Begion and south; infrequent. May — June. 
(B. P.) 
Evanston, Johnson. Otis, Ind., Hill. 
In 1887 the dioecious form was frequent. 
1186. C. musking’umensis, Schwein. 
C. arida, Schwein. & Torr. 
Near Chicago, Northwestern University Herb. Wheeler, Ind., just 
south of our limits, Hill. (B.) 
1187. C. tribuloides, Wahl. 
C. lagopodioides , Schk, 
Moist open woods and banks; frequent in the northern portion 
of our district. June — July 10th. (B.) 
Evanston. Niles. Palatine. Desplaines. Biverside. 
With some heads compound at the base, East Chicago, Ind., June, 
m&,-Hill. 
