108 Rhodora [JUNE 
C. polygama Schkuhr. Swamps and meadows; frequent from 
Canton, Norwood and Framingham northward. 
C. prasina Wahlenb. Wet banks of brooks in woods, rare; New- 
buryport, Medford, Winchester, Arlington, Belmont, Framingham. 
C. Pseudo-Cyperus L. Lowell (C. W. Swan, July 5, 1880); big 
spring, Purgatory Swamp, Norwood (G. G. Kennedy, June 30, 1908). 
C. ptychocarpa Steud. Purgatory Swamp, Norwood (various 
collections from June 23, 1879 to June 4, 1899); "near Boston" 
(Wm. Boott, no date, specimen in Gray Herb.). 
C. retroflexa Muhl. Dry open woods; Boxford, Malden, Stone- 
ham, Woburn, Newton, W. Roxbury, Dedham, Milton; Concord and 
Melrose, according to Dame & Collins, Fl. Middlesex Co. 119, 1888. 
C. riparia W. Curtis. Swamps and stream-borders; occasional 
in central and northeastern portions. 
C. rosea Schkuhr. Woods, common, but not reported from 
southeastern towns. 
C. rosea Schkuhr, var. radiata Dewey. Andover (A. S. Pease, 
June 6, 1904, specimen in herb. A. S. Pease). 
C. rosea Schkuhr, var. minor Boott. Shaker Glen, Woburn 
(C. W. Jenks & C. W. Swan, July 10, 1888); "Concord Turnpike" 
(Wm. Boott, June 10, ). 
C. rostrata Stokes. Bogs and wet shores; frequent in central 
portion; one station between N. Andover and Boxford, in Essex Co. 
C. rostrata Stokes, var. utriculata (Boott) Bailey. Reported 
as frequent from Randolph and Norwood northward. 
C. salina Wahlenb., var. kattegatensis (Fries) Almq. (var. 
cuspidata Wahlenb.). Brackish shores of Mystic River and Alewife 
Brook in Medford (Wm. Boott, June 13, 1853; June 13, 1858; May 29, 
1870; T. Morong, June 25, 1878; F. & C. E. Faxon, June 26, 
1879); Arlington (Wm. Boott, July 18, 1858; June 16, 1861); Arling- 
ton and Medford (F. S. Collins, July 8, 1887); Cambridge (Wm. 
Boott, July 10, 1859): brackish marsh, Newburyport (F. F. Forbes, 
June 13, 1903). 
C. salina Wahlenb., var. kattegatensis (Fries) Almq. X stricta 
Lam. Medford (Wm. Boott, June 13 and June 20, 1858; T. Morong, 
June 25, 1877); Winchester (Wm. Boott, May 22, 1870); Arlington 
(Wm. Boott, June 18 and July 1, 1883; F. S. Collins, June 10 and 
July 8, 1887); Cambridge (Wm. Boott, June 11, 1858 and June 2, 
1867; E. Tuckerman, no date). The Tuckerman specimen was 
