CYPERACEAE (SEDGE FAMILY) 



40 a Plant yellowish; pistillate spikes clustered at top of 



stem ; perigynia yellow YELLOW SEDGE. (C. flava.) 



b Plants light green ; pistillate spikes not conspicuously 



clustered 41 



41 a Plant glaucous throughout 



GLAUCESCENT SEDGE. (C. glaucbdea.) 

 b Plants not glaucous throughout 42 



42 a Mature staminate spikes % in. or more long, stalked ; 



sheaths of leaves hairy PALE SEDGE. (C. pallescens.) 



b Mature staminate spikes less than % in. long, sessile 



or short-stalked 43 



43 a Pistillate spikes 5-i5-flowered GRAY SEDGE. (C. grisea.) 



b Pistillate spikes usually more than 2o-flowered 



MEADOW SEDGE. (C. granularis.) 



44 a Mature pistillate spikes about % in. broad 45 



b Mature pistillate spikes about ^4 in. or less broad. ... 49 



45 a Pistillate spikes conspicuously clustered at top of stem. . 46 

 b Pistillate spikes not conspicuously clustered at top of stem 47 



46 a Perigynia reflexed in fruit, about M= in. long 



RETRORSE SEDGE. (C. retrorsa.) 

 b. Perigynia not reflexed in fruit, about Vi in. long 



HOP SEDGE. (C. lupulnia.) 



47 a Leaves usually V-V-2 in. broad; perigynia bristly, re- 



flexed in fruit BRISTLY SEDGE. (C. comosa.) 



b Leaves ^4 in. or less broad; perigynia not reflexed 



in fruit 48 



48 a Perigynia spreading, usually shining, about lo-nerved 



SALLOW SEDGE. (C. liirida.) 

 b Perigynia ascending, about 15-20- nerved 



PORCUPINE SEDGE. (C. hystrinna.) 



49 a Leaves evergreen %-i in. broad; pistillate spikes com- 



paratively loosely-flowered 



PLANTAIN-LEAVED SEDGE. (C. plantaginea.) 

 b Plants not completely as in a 50 



50 a Staminate spikes with stalks 1-5 in. long 



PORCUPINE SEDGE. (C. hystricina.) 

 b Staminate spikes with stalks less than i in." long 51 



51 a Entire pistillate spike conspicuously loosely-flowered, 



slender stalked and pendulous 52 



b Entire pistillate spike not conspicuously loosely-flowered 54 



52 a Perigynia beakless, strongly nerved; pistillate flowers 



alternately arranged on the spike 



SLENDER WOOD SEDGE. (C. digitalis.) 

 b Perigynia with a beak 53 



128 



