124 Karl M. Wiegand and Arthur J. Eames 



54. C. triceps Michx., var. hirsuta (Willd.) Bailey. (C. triceps of Cayuga Fl.) 

 Damp or dry sandy, gravelly, or stony, neutral or somewhat acid, soils ; scarce. 



June. 



The narrows between Slaterville and Caroline Center ; near South Hill Marsh 

 (D. !) ; Bald Hill, Ithaca; near Bear Swamp (form, D.) ; Esty Glen; near Ludlow- 

 ville (H. B. Lord) ; Utt Point. 



Me. to s. Ont. and Alich., south w. to Fla. and Tex. Primarily a coastal plant, 

 extending inland around the Great Lakes. 



55. C. virescens Muhl. (C. v., var. clliptica, of Cayuga Fl.) 



Dry open woods and banks, in gravellv, somewhat calcareous, soils ; scarce. June 

 15-July. 



Near Summit Marsh (D.) ; Newfield Glen; Caroline hills; Six Mile Creek (£>.!) ; 

 AfcGowan Woods; near Etna (D.) ; Ringwood; Ovid (D.) ; Montezuma. 



S. Me. to s. Ont., southw. to Ga. and Ky., except on the Coastal Plain. 



56. C. Swanii (Fernald) Mackenzie. (C t'ircsccns of Cayuga Fl.) 



Damp grassy pastures, banks, and borders of woods, in gravelly neutral or slightly 

 acid soils; frequent. June 15-July. 



Enfield Glen (£>.) ; near Danby (D.) ; the narrows between Slaterville and Caroline 

 Center; South Hill Marsh; near Etna (D.) ; Freeville (£).!); near McLean Bogs; 

 w. shore of Cayuga Lake, near Marions (D.). 



N. S. to Mich., southw. to N. C, Tenn., and Mo., including the Coastal Plain. 



57. C. scabrata Schwein. 



Springy places in meadows and thickets, in mucky, more or less calcareous, soils ; 

 frequent. June 15-July. 



Michigan Hollow; w. of Key Hill; n. w. of Enfield Falls; e. of West Danby; 

 South Hill ; n. of Buttermilk Glen ; Coy Glen ; Six Mile Creek ; Ellis Hollow ; 

 s. w. of Ringwood; McLean Bogs; Beaver Brook; n. e. of Perry City; Paine Creek; 

 and elsewhere. 



E. Que. to Ont. and Mich., southw. to Pa. and Ohio, and in the mts. to S. C. and 

 Tenn. ; rare or absent on the Coastal Plain. 



58. C. pubescens Muhl. 



Alluvial thickets, in nonacid soils; frequent. June-July 15. 



Enfield Glen (£>.); Six Mile Creek (D. !) ; McGowan Woods (£>.) ; Freeville 

 (£>.); Beaver Brook; region of McLean Bogs; Taughannock Gorge (D. !) ; Paine 

 Creek (£>.); and elsewhere. 



N. S. to N. Dak., southw. to n. N. J., Ky., and Kans. ; rare or absent on the 

 Coastal Plain. 



59. C. pennsylvanica Lam. 



Dry banks and open woods, in sandv or gravelly acid soils ; common. May 10- 

 June 10. 



On the light noncalcareous soils w., s., and s. e. of Ithaca, on the stony soils 

 along the slopes of Cayuga Lake and on the ravine crests, and on the sandy soil n. of 

 the lake ; more local in the gravels of the McLean district ; rare on the clays and 

 richer soils back from the lake shores. 



N. B. to Alberta, southw. to N. C. and Tenn. ; common on the Coastal Plain. 



60. C. varia Muhl. (C. Emmonsii of Cayuga Fl.) 



In situations similar to the preceding, but in richer soil ; frequent. May-June 20. 

 Foot of hill at Lick Brook; Cascadilla Creek; Fall Creek; Renwick slope; glen 

 one mile s. of Willets; w. of Howland Island; and elsewhere. 



N. S. to Ont. and Man., southw. to Ga. and Tex., including the Coastal Plain. 

 The form with dark scales (forma colorata (Bailey) Kuken.) is occasional. 



