CYPERACEAE. 



VOL. I. 



Carex hormathodes Fernald. Marsh Straw Sedge. Fig. 938. 



C. strarninea var. invisa W. Boott, Coult. Bot. Gaz. 9: 86. 



1 884. 

 C. tenera var. Richii Fernald, Proc. Am. Acad. 27 : 475. 



1902. 

 C. hormathodes Fernald, Rhodora 8: 165. 1906. 



Culms very slender, erect or the summit nodding, 

 slightly angled and often strongly roughened above, 

 i-3 high. Leaves shorter than the culm, usually less 

 than i" wide, tapering to a very long tip; bracts, 

 when present, very narrow and bristle-form ; spikes 

 3-9, ovoid, obtuse or short-pointed, densely many- 

 fiowered, separated or the upper contiguous, forming 

 a slender moniliform head,, greenish brown or brown 

 at maturity, 3$"-8" long, staminate and commonly 

 much contracted at the base; perigynia narrowly to 

 broadly ovate, ascending, or with somewhat spreading 

 tips, 2" to nearly 3" long, \"-\\" wide, strongly about 

 lo-nerved on both faces, wing-margined, the rough 

 beak about half as long as the body; scales lanceolate, 

 long-acuminate or aristate, nearly as long as the peri- 

 gynia, but much narrower ; stigmas 2. 

 In wet soil, chiefly near coast, Gulf of St. Lawrence to Virginia, locally inland to Ontario and 



recorded from Iowa ; also on Pacific coast. May-June. Illustrated in our first edition as C. 



tenera Dewey. 



72. Carex suberecta (Olney) Britton. Prairie Straw Sedge. Fig. 939. 



C. foenea var. ferruginea Gray, Man. Ed. 5, 580. 1867. 



Not C. ferruginea Scop. 

 C. tenera var. suberecta Olney ; Bailey, Proc. Am. Acad. 



22: 149 (as synonym). 1889. 

 C. suberecta Britton, Man. Ed. 2, 1057. 1905. 



Culms erect, slender, acutely triangular and strongly 

 roughened, 2 ~3 high. Leaves \"-\\" wide, shorter 

 than the culm ; lower one or two bracts usually de- 

 veloped, but snorter than the head and inconspicu- 

 ous; spikes 2-5, silvery greenish or slightly brown- 

 ish-tinged, short-pointed or rounded, densely many- 

 flowered, ovoid, 3i"~7" long, 2$ "-4" wide, approxi- 

 mate in a head 7"-i5" long, 4"-7" thick; perigynia 

 erect, strictly appressed, ovate, strongly margined, 

 rounded at base, 2"-2i" long, slightly more than 

 i" to nearly \\" wide at base, distended over achene, 

 tapering gradually into a rough 2-toothed beak i~j 

 the length of the nerveless or obscurely nerved body ; 

 scales ovate, short-acuminate to obtusish, silvery- 

 green, or in age ferruginous, shorter and rather 

 narrower than the perigynia ; stigmas 2. 



Moist places, Ontario and Ohio to Michigan, Illinois 

 and Iowa. May-July. 



73. Carex alata Torr. Broad-winged Sedge. 

 Fig. 940. 



Carex alata Torr. Ann. Lye. N. Y. 3 : 396. 1836. 



Culms stiff, rather stout, strictly erect, slightly rough- 

 is!^ above, i -^ tall. Leaves grass-like, but somewhat 

 rigid, i "-2" wide, shorter than the culm, sheaths green 

 nearly to chartaceous auricle; spikes suborbicular to 

 oblong-conic, whitish-green or in age brownish-green, 

 very densely many-flowered, 5"-8" long, 3"~s" thick, 

 the lateral rounded or little clavate at base, pointed or 

 obtuse at the summit, all distinct but usually little sepa- 

 rated, bractless, or short-bracted ; perigynia orbicular or 

 obovate-orbicular, very broadly winged, 2"-2" long, 

 nearly i$" or more broad, firm, faintly few-nerved or 

 almost nerveless on inner face, erect and appressed, or 

 somewhat curved upward, the short, abrupt beak about 

 one-third as long as the body ; scales lanceolate, acumi- 

 nate or aristate, scarcely shorter and much narrower 

 than the perigynia ; achene distinctly stipitate ; stigmas 2. 



soil, New Hampshire to Florida, inland to Michigan. May-June. 



In moist 



