72 Karl M. Wiegand and Arthur J. Eames 



1. E. virginicus L. Wild Rye. 



Alluvial bottom lands and stream banks ; frequent. July 15-Aug. 



Cayuta Lake ; along the railroad s. of Caroline Depot ; Beebe Lake ; Renwick flats 

 and woods ; Taughannock Gorge ; McLean Bogs ; and elsewhere. 



Newf. to Mont., southw. to D. C, La., Tex., and Colo., including the Coastal 

 Plain. 



la. E. virginicus L., var. hirsutiglumis (Scribn.) Hitchc. 



In situations similar to the preceding ; frequent. 



Fall Creek, above and below Forest Home ; Renwick marshes and woods ; Myers 

 Point ; Union Springs ; and elsewhere. 



N. S. to Nebr., southw. to Pa. and Mo. 



2. E. australis Scribn. & Ball, var. glabriflorus (Vasey) Wiegand. 

 Alluvial river banks; rare. July 15-Aug. 



S. end of Negundo Woods, a large patch on e. side of creek, probably this species 

 though approaching E. virginicus. 



Mass. (Ayer), cent. N. Y., and from Md. and Tenn. to Nebr., southw. to Fla. 

 and Tex. 



3. E. riparius Wiegand. (See Rhodora 20:81. 1918. E. canadensis of Cayuga 



Fl., in large part.) 



Stream margins and alluvial bottom lands, probably only in calcareous soils ; com- 

 mon. July-Sept. 



Generally distributed throughout the basin, but not collected from the foot of 

 Cayuga Lake. The commonest species of Elymus in this flora. 



Me. to N. Y. and Ky., southw. to Va. and W. Va. ; rare or absent on the Coastal 

 Plain. 



4. E. striatus Willd. (Including var. villosns of Cayuga Fl.) 



Rich rocky woodlands, and thickets on alluvial soils, mostly in calcareous districts ; 

 frequent. July 15-Aug. 



Enfield Glen (D.) ; Negundo Woods (D. !) ; Renwick woods; near Indian Spring; 

 Fall Creek, above Forest Home; near Shurger Glen (D.) ; shore of Cayuga Lake 

 (D. !) ; talus on Cayuga Lake cliffs in Lansing and n. of King Ferry; w. of Canoga ; 

 near Salmon Creek (D.) ; Big Gully. 



E. Mass. and Vt. to Wis., southw. to Del., Nebr., Kans., and Okla., and in the mts. 

 to N. C. ; rare on the Coastal Plain. 



5. E. canadensis L. 



Alluvial river banks, mostly in limestone regions ; rare. Aug. 

 Bank of Inlet, in several places near Negundo Woods. 



Que. to the interior of Me., N. H., Vt., w. Mass., n. Conn., n. and cent. N. Y., 

 and n. Penn. 



All the material from the Cayuga Lake Basin has glabrous foliage. 



6. E. robustus Scribn. & Sm., var. vestitus Wiegand. (See Rhodora 20:81. 1918. 



E. canadensis, var. giaucifolius, of Cayuga Fl.) 



Dry sandy or gravelly banks and cliffs, mostly in neutral or even slightly acid 

 soils ; locally common. Aug.-Sept. 



In most of the ravines of the basin, and common along the east shore of Cayuga 

 Lake. 



N. B. and Me. to Oreg., southw. to Del., Mo., and Ariz. ; less frequent on the 

 Atlantic Coastal Plain. 



