3 S2 



CYPERACEAE. 



Vol. I. 



65. Carex Bebbii Olney. Bebb's Sedge. 

 Fig. 932. 



C. tribuloides var. Bebbii Bailey, Mem. Torr. Club 1 : 55. 



1889. 

 C. Bebbii Olney ; Bailey, Bot. Gaz. 10 : 379. 1885. 



Culms erect, acutely triangular and roughened above, 

 rather slender, 8'-2i° high, in dense clumps. Leaves 

 i"-2i" wide, shorter than the culm; lower one or two 

 bracts usually developed but inconspicuous; spikes 

 usually 5-10, brownish-tinged, blunt, densely many- 

 flowered, subglobose to broadly ovoid, 2"-$" long, 

 ii"-3" wide, aggregated into an oblong or linear- 

 oblong head 7"-i4" long, 4"-6" thick; perigynia as- 

 cending, narrowly ovate, wing-margined to the 

 rounded base, ii"-2" long, 4"-i wide at base, dis- 

 tended over achene, tapering into a rough 2-toothed 

 beak, less than half length of the obscurely nerved 

 body ; scales oblong-ovate, acute or short-acuminate, 

 brownish, nearly as wide as but shorter than perigynia ; 

 stigmas 2. 



In low grounds, Newfoundland to British Columbia and 

 northward, southward to New Jersey, Illinois and Colo- 

 rado. June-August. 



66. Carex straminea Willd. Straw Sedge. Dog- 

 grass. Fig. 933. 



Carex straminea Willd. ; Schk. Riedgr. 49. /. $4. 1801. 

 Carex tenera Dewey, Am. Journ. Sci. 8 : 97. 1824. 



Culms very slender, roughish above, i°-2i° long, the 

 top often nodding. Leaves 1" wide or less, long-pointed, 

 shorter than the culm ; bracts short or the lower bristle- 

 form and exceeding its spike ; spikes 3-8, subglobose or 

 slightly obovoid, 2"-24" thick, light brown or greenish, 

 separated on the commonly zigzag rachis, or contiguous, 

 usually clayate at base ; staminate flowers basal ; perigynia 

 widely spreading to ascending, narrowly to broadly ovate, 

 green, iJ"-2" long, S"-lJ" wide, strongly several-nerved 

 on the outer face, fewer-nerved or nerveless on the inner, 

 wing-margined, much distended over achene, tapering into 

 the rough 2-toothed beak; scales lanceolate, acute, some- 

 what shorter and narrower than the perigynia ; stigmas 2. 



In woods, New Brunswick to British Columbia, Kentucky, 

 Arkansas and California. June-July. 



67. Carex normalis Mackenzie. Larger Straw Sedge. Fig. 934. 



C. mirabilis Dewey, Am. Journ. Sci. 30 : 63, pi, Bb. f. 92. 



1836. Not Host, 1809. 

 C. straminea var. mirabilis Tuckerm. Enum. Meth. 18. 



1843. 

 C. mirabilis var. perlonga Fernald, Proc. Am. Acad. 37 : 



473. 1902. 

 C. normalis Mackenzie, Bull. Torr. Club 37: 244. 1910. 



Culms erect or sometimes weak and spreading, 

 triangular, roughened above, 2°-3i° high, in dense 

 clumps. Leaves ii"-3" (averaging 2") wide, much 

 shorter than the culm ; lower one or two bracts some- 

 what developed; spikes 4-12, green or brownish- 

 tinged, blunt with 10-30 perigynia, subglobose, 3"- 

 4i" long, 2i"-4" wide, usually clavate at base, sepa- 

 rate or aggregated into a head 1/-2' long and S" wide 

 or occasionally in a moniliform head; perigynia 

 spreading, thickish, ovate, wing-margined, rounded at 

 base, ii -2" long, f"-i" wide near base, distended 

 over achene, conspicuously nerved on outer, fewer- 

 nerved or nerveless on inner face, tapering into a 

 rough 2-toothed beak about half the length of body; 

 scales ovate, nearly width of but shorter than peri- 

 gynia. 



Woodlands, Quebec to North Carolina, Kansas and Manitoba and in the western mountains. 



