3 6S 



CYPERACEAE. 



VOL. I. 



23. Carex aggregata Mackenzie. Glomerate 

 Sedge. Fig. 890. 



Carex agglomerate, Mackenzie, Bull. Torr. Club 33 : 442. 

 1906. Not C. B. Clarke, 1903. 



Carex aggri'gata Mackenzie, Bull. Torr. Club 37 : 246. 

 1910. 



Culms slender, erect, triangular, rough beneath 

 head only, 2 or less tall. Leaves i*"-2" wide, 

 shorter than the culm; bracts bristle-form, elongated 

 but shorter than the head ; spikes numerous, an- 

 drogynous, ovoid or subglobose, densely aggregated, 

 even the lowest but slightly separate, the head !2"-i8" 

 long, 5" thick; perigynia ascending or spreading, a 

 little more than ii" long, the body ovate, i" wide, 

 nerved on outer, nerveless on inner face, tapering 

 into a 2-toothed beak about length of body ; scales 

 ovate, hyaline with green midrib, acuminate to cuspi- 

 date, narrower than and about length of body of 

 perigynia ; stigmas 2. 



In dry woods, District of Columbia to Missouri. May- 

 June. 



24. Carex sparganioides Muhl. Bur-reed 



Sedge. Fig. 891. 

 C. sparganioides Muhl.; Willd. Sp. PI. 4: 237. 1805. 



Rather dark green with white and green mottled 

 sheaths, culms stout or slender, rough above, sharply 

 3-angled, i-3 tall. Leaves broad and flat, 2.\"-^" 

 wide, usually shorter than the culm, their lower part 

 septate-nodulose as are the loose membranous trans- 

 versely rugulose sheaths; spikes 6-12, deep green, 

 oblong or subglobose, 2.\"-^' in diameter, 15-50- 

 flowered, the upper aggregated, the lower 2-4 com- 

 monly separated, the lower bracts developed ; peri- 

 gynia flat, ovate, i?" long, i" wide, spreading or 

 radiating, narrowly wing-margined to the rounded 

 base, faintly few-nerved on the outer face, the rough 

 2-toothed beak one-half the length of the body ; 

 scales ovate, hyaline, acute or cuspidate, equalling 

 body of perigynia; stigmas 2. 



In woods and thickets. New Hampshire to Ontario 

 and Michigan, south to Virginia, Kentucky and Kansas. 

 Ascends to 2100 ft. in Virginia. June-Aug. 



25. Carex alopecoidea Tuckerm. Foxtail Sedge. 



Fig. 892. 



Carex cephalophora var. maxima Dewey, Am. Journ. Sci. 



43: 92. 1842. 

 Carex alopecoidea Tuckerm. Enum. Meth. 18. 1843. 



Light green, culms stout but soft, sharply 3-angled, 

 flattened, narrowly winged, erect or reclining, i2-3 

 long, roughish above. Leaves flat, i*"-4" wide, shorter 

 than or exceeding the culm, the sheath band strongly 

 reddish-dotted but not transversely rugulose; bracts 

 almost filiform, commonly short ; spikes androgynous, 

 several or numerous (10 or fewer) in a compact or 

 somewhat interrupted head i'-2' long, 4"-$" thick; 

 perigynia ovate or ovate-lanceolate, rounded at base, 

 short-stipitate, \\"-2" long, green or at maturity, yel- 

 lowish brown, faintly feAV-nerved on the outer side, 

 the tapering rough 2-toothed beak nearly as long as the 

 body ; scales ovate, brownish-tinged, acuminate or 

 short-awned, about as long as the perigynia ; stigmas 2. 



In meadows, Maine to Pennsylvania and Michigan. 

 Local. June-July. 



