98 Karl M. Wiegand and Arthur J. Eames 



/. Glomerules dense ; spikelets subglobose or oval, rather small (3-4 mm. 

 long) ; bristles very crisp; involucels and scales brown or brownish 

 lead-color, rarely more rufous; plant stout or rather slender (9-15 

 dm. high) ; leaves 5-8 mm. wide ; culms at summit 1.8-5 mm. in diam. 



15. S. cypcrinus 

 f. Glomerules looser, some spikelets often pedicelled ; spikelets ellipsoid- 

 oval or oval, 4-5 mm. long ; bristles more lax. 

 g. Plant stout (12-17 dm. high) ; leaves 5-7 mm. wide; culms at summit 

 2-2.5 mm. in diam. ; involucels and scales lead color, brown, or 

 rarely rusty. 15a. 5". c, var. ■ — 



g. Plant slender (8-13 dm. high); leaves 3-5 mm. wide; culms at 

 summit 1.1-1.5 (1.8) mm. in diam.; involucels and scales brown or 

 brownish lead-color. 15b. 5". c, var. pelius 



e. Fruit early (shedding achenes June 25- Aug. 7, rarely Aug. 18) ; spikelets 

 elliptic-oval or oblong, nearly all pedicelled. 

 /. Plant stout (12-15 dm. high) ; leaves 5-8 mm. wide; culms at summit 

 1.8-4 mm. in diam.; involucels and scales brown-; spikelets 3-9 mm. 

 long. 16. S. pedicellatus 



f. Plant slender (6-11 dm. high) ; leaves 3-5 mm. wide; culms at summit 

 1-1.8 (2) mm. in diam. ; involucels and scales dark lead-color, rarely 

 brown; spikelets 3-7 mm. long. " 17. 5". atrocinctus 



1. S. nanus Spreng. 



Muddy shores in brackish soils ; very rare. Aug.-Sept. 



Salt Pond w. of Howland Island, 1919 (K. M. W ., A. J. E., & L. F. Randolph). 

 Salt and brackish marshes along the coast, Newf. to Fla. and Tex. Found 

 also inland in N. Y. and Mich., and in Mex., Cuba, Eu., and n. Africa. 



2. S. pauciflorus Lightf. (Eleocharis pauciflorns of Cayuga Fl.) 

 Wet sandy swales and shores, in calcareous soils ; rare. July-Sept. 



Gravelly shore of Spencer Lake; Summit Marsh, n. end (D. !) ; Utt Point (D. !) ; 

 Farley Point (£>.). 



Newf. to B. C, southw. to n. N. E., N. Y., Pa., 111., Colo., and Calif. ; rare or 

 absent on the Atlantic Coastal Plain. 



3. S. planifolius Muhl. 



In and about dry open woodlands, in gravelly or rocky, neutral or slightly acid, 

 soils ; scarce. May-June. 



South Hill, beyond the "Incline" (£>.); Fall Creek (£>.) ; Renwick slope (D.\) ; 

 near Esty Glen; absent on the more acid chestnut soils of the basin, also on the 

 limy soils and the heavy clays. 



Mass. and Vt. to w. N. Y. and Mo., southw. to D. C, including the Coastal Plain. 



4. S. hudsonianus (Michx.) Fernald. (Eriophorum alpinum of Cayuga Fl.) 

 Boggy and somewhat limy meadows and swamps; rare. May 25-July 15. 

 McLean Bogs (£>.!) ; Westbury Bog (K. M. W ., L. H. MacDaniels, & F. P. 



Metcalf). 



Newf. to Hudson Bay and B. C, southw. to Conn., N. Y., and Minn. 



5. S. Smithii Gray. 



Sandy shores ; rare. Aug.-Sept. 



Renwick Park (K. M. W. & C. C. Thomas); Myers Point (£>.) ; Utt Point; 

 Farley Point (D.) ; mouth of Big Gully Brook (D. !). 



Me. and Ont. to Minn., southw. to Pa. and Nebr., including the Coastal Plain. 



Possibly influenced in its local occurrence by the well-known brackish conditions 

 about Cayuga Lake. 



