jS 4 



CYPERACEAE. 



VOL. I. 



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



C. straminea var. invisa W. Boott, Coult. Bot. Gaz. g : 86. 



1884. 

 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- 

 flowered, 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, i"-ii" wide, strongly about 

 io-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. focnca var. ferruginea Gray, Man. Ed. 5, 580. 1867. 



Not C. ferruginea Scop. 

 C. tenera var. snberecta 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 i"-i' wide, shorter 

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

 veloped, but shorter 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\"-^' wide, approxi- 

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

 erect, strictly appressed, ovate, strongly margined, 

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

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

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

 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- 

 ish above, i-3* 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"-$" 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"-2i" long, 

 nearly ii" 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. 



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



