120 Karl M. Wiegand and Arthur J. Eames 



32. C. muricata L. (See Bui. Torr. Bot. Club 50:346. 1923. Rhodora 19: 154. 



1917. C. stellulata, vars. excelsior and ccphalantha, of Gray's Man., ed. 7. C. 

 ecJiinata of Cayuga Fl.) 

 Swales about bogs and in meadows, especially on gravelly soils; scarce. June 20- 

 July. 



Summit Marsh; meadow w. of Woodwardia Bog; Freeville Bog. 

 Xewf. to Wis., southw. to D. C. and N. Y., including the Coastal Plain. 

 The form found here is var. cephalantha, not the typical form of Eu. 



Subsection B. Ovales 



33. C. tribuloides Wahl. (C. lagopodioides of Cayuga Fl.) 



Meadows, ditches, and on the borders of pools, in various soils ; not uncommon. 

 July. 



X. B. to Sask., southw. to Fla. and Ariz. ; apparentlv infrequent on the Coastal 

 Plain. 



33a. C. tribuloides Wahl., var. turbata Bailey. 

 Borders of swamps ; occasional. July. 

 Michigan Hollow Swamp ; and elsewhere. 

 Range same as that of the species. 



34. C. projecta Mackenzie. (See Bui. Torr. Bot. Club 35:264. 1908. C. tribuloides, 

 var. reducta Bailey. C. lagopodioides, var. moniliformis, of Cayuga Fl.) 



Swales, ditches, and meadows, mostly in gravelly, not clearly acid, regions ; 

 frequent. June-July. 



Spencer Lake; Michigan Hollow (D.) ; Slaterville Swamp; Freeville Bog; 

 McLean Bogs (D. !) ; Chicago Bog; swamps in Conquest; and elsewhere. 



Newf. to N. Dak., southw. to D. C. and 111. ; rare or absent on the Coastal Plain. 



35. C. cristata Schwein. 



Marshes, swales, and along streams, in rich alluvial and more or less calcareous or 

 saline soils ; common. June 20-Aug. 10. 



Michigan Hollow Swamp; s. of Caroline Depot; McLean district; marshes and 

 gravelly points along Cayuga Lake ; Montezuma salt flats ; Westbury marl meadow ; 

 and elsewhere. 



E. Alass. and Yt. to B. C, southw. to Ya. and Mo. ; rare or absent on the Atlantic 

 Coastal Plain. 



36. C. mirabilis Dewey. (C. cristata, var. mirabilis, of Cayuga Fl.) 



Damp grassland, along roadsides and borders of woods and in thickets, in various 

 heavy nonacid soils ; frequent. June. 



Brook n. e. of Spencer Lake; Lick Brook and Inlet Valley s. ; South Hill (D.) ; 

 Cascadilla woods; Cayuga Heights, often abundant; Renwick (D.) ; Malloryville : 

 near Esty Glen ; s. of Waterburg ; s. w. of Mecklenburg ; Union Springs ; w. of 

 Howland Island. 



Que. (?) and Me. to Man., southw. to X. C. and Mo.; rare or absent on the Coastal 

 Plain. 



37. C. scoparia Schk. 



Low. often exsiccated, grounds, in various soils ; very common. June 20-July. 

 Xewf. to Sask. and Oreg., southw. to Fla. and Colo., including the Atlantic 

 Coastal Plain. 



37a. C. scoparia Schk., var. condensa Fernald. (Yar. intermedia of Cayuga Fl.?) 

 In situations similar to the preceding ; occasional. 



