CYPERACEAE (SEDGE FAMILY) 



251 



534. C. comosa. 



533. C. Pseudo-Cyperus. 



zigzag rhachis, 1.5-4 cm. long, 1 cm. thick, evenly 

 cylindrical, often staminate at top ; perigynia eery 

 abruptly contracted into a short but slender toothed 

 heak. (C. stenolepis Torr.) — Swamps and mead- 

 ows, Pa. to 111. and south w. June-Sept. Fig. 

 532. 



164. C. Pseudo-Cyplrus L. Tall and rather 

 stout, 0.5-1 m. high, in clumps ; culm thick and 

 very sharply triangular, rough throughout ; leaves 

 very long, rough-margined, 0.5-1 cm. wide ; spikes 

 3-5, slenderly peduncled and more or less droop- 

 ing, somewhat contiguous, 2.5-7.5 cm. long, nar- 

 rowly cylindincnl (8-11 mm. thick), very compactly 

 floioered ; perigynia strongly reflexed, more or less 

 2-edged, many-costate, the beak shorter than the 

 body, with erect short (0.5-1 mm. long) teeth; 



scales very rough-awned, about the 



length of the perigynia. — Bogs and 



shallow water, Gulf of St. Lawrence 



to Sask., locally s. to Ct., centr. 



N. Y. and the Great Lakes. June- 



Aug. (Eu.) Fig. 533. 



165. C. combsa Boott. Mostly 



stouter (0.5-1.5 m. high), the leaves 



broader (6-16 mm. wide) ; spikes 



1.3-1.7 cm. thick, more loosely flow- 

 ered; perigynia longer, the beak mostly longer than the body and the teeth 

 long (1.2-2 mm.) and spreading. (C. Pseudo-Cyperus, var. amencana Hoch.st.) 



— Swamps, N. S. to Wash., s. to Fla., La., and s. Cal. 

 June-Aug. Fig. 534. 



166. C. hystericina Muhl. Slender but erect, 2.5-1 m. 

 high ; culm very sharply angled and rough, at least above ; 

 leaves 3-10 mm. broad, roughish ; spikes 2-5, borne neai 

 the top of the culm, rarely very remote, the upper often 

 sessile, the remainder on more or less liliform stalks, 

 spreading or drooping, 1.5-6 cm. long, 1-1.5 c?)i. thick^ com- 

 pactly flowered ; perigynia greenish 

 or straw-colored, strongly 15-20- 

 nerved^ the very slender beak 

 strongly toothed ; scale nearly or 

 quite as long as the perigynium. 



— Swales, throughout ; frequent. 

 June-Aug. (Jamaica). Fig. 535. 



— Tall specimens with long pen- 

 dulous spikes have been separated 

 as the scarcely distinguishable var. 

 CooLi:Yi Dewey (var. Dudleyi 

 Bailey). 



167. C. lurida Wahlenb. Vari- 

 able in size, 0.2-1 m. high, stout ; 

 culm rather obtusely angled and 

 smooth ; leaves long and loose, 

 4-6 mm. wide, rough, the bracts 

 leafy, elongated ; spikes 2-4, vari- 

 ously disposed, the 1 or 2 upper sessile, nearly erect or often drooping, the 

 others more or less peduncled, approximate or remote, very densely Howered, 

 globose to thick-cylindric, 1.5-6 cm. long, 1.5-2 cm. thick; perigynia tliin 

 and turgid, somewhat shining, about lO-nei'ved, the body barely equaling th-; 

 slender long-conic beak ; staminate spike single ; scales linear, half as lon«. 

 as the peri^nia or more, — Swamps and wet woods, N. S. to Ont., and southw. ; 



535. C. hystericina. 



C. lurida. 



