PLANTS OF SOUTHERN NEW JERSEY. 287 



ee. Achenes ellipsoid ovoid, angles not prominently knobbed. 



C. liipulma, p. 292 

 ddd. Swollen at base tapering to a slender beak. 



e. Spikes erect or somewhat pendant, but achenes and scales 



never reflexed, 25-65 X 20 mm. C. lurida, p. 293 



ec. Spikes all pendant and scales and achenes reflexed, 



35-50 X 12 mm. C. comosa, p. 293 



cc. Achenes 5 mm. long or less. 



d. Stems scabrous, achenes long beaked, often partly reflexed. 



C. scabrata, p. 295 

 dd. Stems not scabrous. 



e. Achenes reflexed, staminate spike strictly sessile, oblique 

 from base of upper pistillate spike, the latter yellow. 



C. Aava, p. 300 

 ee. Achenes not reflexed. 

 f. Spikes pendant. 



g. Pistillate spike 50 mm. long or more, 12 mm. thick, 

 achenes plano-convex. 



h. Leaf sheaths glabrous. C. crinita. p. 298 



hh. Leaf sheaths scabrous hispid. 



C. gynandra. p. 298 

 gg. Pistillate spikes 25-50 mm. long, 5-6 mm. thick. 



h. Scales largely deep purplish black, spikes 25 

 mm. long. C. barrattii, p. 297 



hh. Scales brown or purplish, spike 16 mm. long. 



C. limosa, p. 297 

 hhJi. Scales green or brownish, spikes very slender, 

 tip of staminate spike often pistillate, all spikes 

 filiform peduncled. 



i. Achenes short. C. prasina, p. 297 



a. Achenes long and slender. 



y. Achene twice as long as the scale. 



C. tenuis, p. 299 

 ;'/. Achene three times as long as the scale. 

 C. oblita, p. 299 

 ff. Spikes erect. 



g. Achenes densely pubescent, pistillate spikes one or 

 two close to the staminate spike. C. vestita, p. 295 

 gg. Achenes glabrous. 



h. Pistillate spikes 2-3 close to the staminate spike 

 (none half way down the stalk), spikes thick 

 and short 12 X 5 mm. C. pallesccns, p. 301 

 hh. Pistillate spikes somewhat remote, one always 

 well below the others. 

 i. Perigynia ovoid, beakless. 

 /. Plant densely glaucous. 



C. glaucodea, p. 300 

 /;. Plant green, not glaucous. 



C. grisea, p. 300 



