CYPERACEAE (SEDGE FAMILY) 



251 



533. C. Pseudc-Cyperus. 



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

 cylindrical, often staminate at top ; perigynia very 

 abruptly contracted into a short but slender toothed 

 beak. (C. stenolepis Torr.) Swamps and mead- 

 ows, Pa. to 111. and southw. June-Sept. FIG. 

 632. 



164. C. Pseudo-CypSrus 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 cylindrical (8-11 mm. thick}, very compactly 

 flowered ; 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. com6sa 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. americana Hochst.) 

 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 near 

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

 sessile, the remainder on more or less filiform stalks, 

 spreading or drooping, 1.5-6 cm. long, 1-1. 6 cm. 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. 

 COOL^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 5^ c i uri( ja. 



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 flowered, 

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

 and turgid, somewhat shining, about W-nerved, the body barely equaling the 

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

 as the perigynia or more. Swamps and wet woods, N. S. to Ont., and southw. ; 



535. C. hystericina. 



