132 Karl M. Wiegand and Arthur J. Eames 



101a. C. retrorsa Schwein., var. Bradleyi (Dewey) Farwell. (See Rhodora 

 23:87. 1921. C. r., var. Hartii, of Gray's Man., ed. 7, and of Cayuga Fl.) 

 In situations similar to the preceding ; scarce. 



Inlet Marshes (£>.) ; Ellis Hollow Swamp (£>.) ; Ludlowville (H. B. Lord). 

 N. H. to*Ont. and Mich. 



102. C. rostrata Stokes. (C. utriculata, second form and var. minor, of Cayuga 

 Fl.) 



Boggy meadows and swales, in neutral or possibly more or less calcareous regions ; 

 frequent. June 15-July. 



"The common form, occurring in the larger marshes and along our ponds and 



lakes " (D.) ; sphagnum meadows along creek above Enfield Falls; 



Slaterville Swamp; Freeville; McLean Bogs (D.) ; Chicago Bog; Ludlowville; 

 Canoga Marshes (D.) ; Lake Como. 



Newf. and Lab. to Sask. and B. C, southw. to Conn., N. Y., 111., Utah, and Calif.; 

 rare on the Atlantic Coastal Plain. 



102a. C. rostrata Stokes, var. utriculata (Boott) Bailey. (C. utriculata, first form, 

 of Cayuga Fl.) 

 In situations and soils similar to the preceding ; scarce. 



Summit Marsh (D. !) ; Inlet Marshes (D.) ; Michigan Hollow Swamp (£>.). 

 Range nearly as in typical form, but extending southw. to N. J. and Ohio. 



103. C. folliculata L. 



Boggy thickets, in sandy or gravelly, poorly drained, neutral or acid soils; scarce. 

 June-Aug. 



South Hill Marsh (D.l) ; n. of Forest Home, in woods (D.) ; n. of Etna (D.) ; 

 Freeville, in Fir Tree Swamp (D.) and Freeville Bog (D.l) ; Beaver Brook swamp 

 (D.) ; absent from the more limy soils and from the richer soils. 



Newf. to Out. and Mich., southw. to S. C. and W. Va., locally abundant. A 

 plant primarily of the Coastal Plain. 



104. C. Pseudo-Cyperus L. 



On hummocks and logs, in shallow boggv waters about peat bogs ; rare. June- 

 July. 



Spencer Lake, 1924; Lake Como (Locke Pond, D.) ; n. of Cayuga (B. G. Cole) ; 

 Junius peat bogs. 



Newf. to Sask., southw. to Conn., cent. N. Y., and the Great Lakes; rare or absent 

 on the Coastal Plain. 



105. C. comosa Boott. 



Swales and marshes, in boggv, more or less acid, soils ; frequent. June 20- 

 July. 



Spencer Lake ; Michigan Hollow Swamp ; Enfield Valley, above the Falls ; Cayuta 

 Lake (D.l); Ren wick marsh; Freeville Bog; Dryden Lake; McLean Bogs; Vande- 

 mark Pond: Miller Bog. Spring Lake; Mud Pond, Conquest; Clyde River flats. 



N. S. to Wash., southw. to Fla., La., and s. Calif., including the Atlantic Coastal 

 Plain. 



Apparent hybrids with C. hystericina occur at Junius on the marly moor of Vande- 

 mark and Newton Ponds {A. J. E. & L. H. MacDaniels), and at Pout Pond (D.). 

 In all cases the achenes are undeveloped. A hybrid with C. lurida was reported from 

 West Danby by Dudley. 



106. C. hystericina Muhl. 



Springy spots and meadows, in rich mucky or boggy, more or less calcareous, 

 soils; frequent. June 10-July IS. 



