The Flora of the Cayuga Lake Basin 317 



4. Gaura L. 

 1. G. biennis L. 



Damp banks or .shores, in sandy or gravelly, more or less calcareous, soils; 

 occasional. July 20-Oct. 



Swale along road between Buttermilk Creek and Enfield Creek; near the Old 

 Armory, C. U. campus, formerly (D.) ; Six Mile Creek (D. !) ; Renwick; Taughan- 

 nock Point; s. of Utt Point; Union Springs; "not rare on the sandy points all along 

 Cayuga L." (£>.). 



W. Que. and Conn, to Minn., southw. to Ga., Nebr., and Ark. ; rare on the Coastal 

 Plain. 



5. Circaea (Tourn.) L. 



a. Leaves firm, shallowly undulate-dentate; sepals 1.8-2.6 mm. wide; disk cup-like, 

 prolonged about 0.5 mm. above the perianth ; anthers 0.7-1 mm. long ; fruit with 

 3-5 corrugations on each face, 3.5-5 mm. thick (including the hairs). 



1. C. latifolia 

 a. Leaves thin, flaccid, coarsely sharp-dentate, more cordate; sepals 0.8-1.7 mm. wide; 

 disk inconspicuous ; anthers 0.2-0.8 mm. long ; fruit more clavate, not corrugated, 

 1-3 mm. thick. 

 b. Rhizome slender, scarcely tuberous-thickened; sepals 1.2-1.7 mm. wide; petals 

 2.3-3.5 mm. long; anthers 0.5-0.8 mm. long; fruit 2-celled, 1.5-3 mm. thick; 

 hairs long. 2. C. canadensis 



b. Rhizomes tuberous-thickened; sepals 0.8-1.2 mm. wide; petals 1.2-2.5 (3) mm. 

 long; anthers 0.2-0.3 mm. long; fruit 1-celled, 1-1.5 mm. thick; hairs very 

 short. 3. C. alpina 



1. C. latifolia Hill. (See Rhodora 17:222, 1915, and 19:87, 1917. C. lutetiana of 



authors and of Cayuga Fl.) Enchanter's Nightshade. 



Rich moist or rather dry gravelly woodlands and banks, chiefly in neutral soils; 

 not uncommon. July-Aug. 



On the gravelly banks in or near most of the ravines of the basin, Renwick woods, 

 and especially the woods of the McLean district; rare or absent on the ericaceous- 

 chestnut soils and on the clays. 



N. B., N. S., and Me., to Minn., southw. to N. C, Tenn., and Okla., but much less 

 common, or rare, on the Coastal Plain. Found also in e. Asia. 



Fernald (Rhodora 19:85, 1917) gives other differences between these three 

 species of Circaea. 



2. C. canadensis Hill. (See Rhodora 19:87. 1917. C. intermedia of Gray's Man., 



ed. 7.) 



Damp rich alluvial bottom-land woods, in gravelly, more or less calcareous, soils; 

 rare. July-Sept. 



Below Lucifer Falls (A. J. E. and E. Dean) ; below the falls, Taughannock 

 Gorge ; Salmon Creek, below Genoa. 



E. Que. and N. S., to w. Mass. and N. Y. Found also in Eu. 



3. C. alpina L. 



Damp ground and rotting logs in cool woodlands, mostly over gravelly calcareous 

 soils; frequent. June 20-Aug. 



Caroline hills; Coy Glen; Six Mile Creek; n. e. of Hanshaw Corners; Mud Creek, 

 Freeville ; McLean Bogs ; Beaver Brook ; Shurger Glen ; e. of Clyde ; and elsewhere. 



S. Lab. to James Bay and Alaska, southw. to s. N. E., Ga., the Great Lakes, and 

 S. Dak.; rare on the Atlantic Coastal Plpm. Found also in Eurasia. 



