Carex. 



CYPERACE.K. 



22' 



46. 



47. 



C. ANGUSTATA. 

 C. «r,NTA. 



C. LENTICULAUIS. 

 C. SAUNA. 



48. C. SiTCHENSIS. 



49. C. Jamesii. 



50. C. laciniata. 



51. C. PllESCOTTIANA. 



entire : lower bracts exceeding tlie stem : alientlis not 

 lil.ioiis-reticulate. 4,^. (\ aquatilis. 



Male s|>ilvcletM 1 to 3, the fciiinle 1 to 4, coninioiily ninlo nt top: 

 bracts scliloni exceeding tiie stem : lower sheaths conspic- 

 nonsly lihrous-reticulate : jierigyniiini nerveless or 1-4- 

 iierved, broader than the scale. 



Lower sheaths scabrous, fibrous-reticulate : male spikelets 1 or 

 2 ; female 2 : bracts shorter than tlic stem : perigynium 

 ovate, toothed on the margins : npjter scales mncronate. 



Male9]»ik(dets 1 or 2, often femaleattnp : i>erigyiiium pale, broad- 

 ly oval, ending in a short cylindrical entiie beak, iiiconvcx, 

 stipitate, nerved : bracts longer than the stem : scales 

 1 -3-nerve(l : slieaths entire. 



Stem 2A to 5 inches high : bracts exceeding the stem, sheathed : 

 perigynium oval, nerved, the orifice entire : scales clasping, 

 liroadly oval, obtuse or the female awned, 3-nerved. 



Stem 1 to 4^ feet liigh, stout: lower sheatiis fibrous-reticulate: 

 male sjjikclets 1 to 4 ; female 3 to 5, 1 to 4 inches long : 

 perigynium purple, orbicular-obovoid, turgid, stipitate, co- 

 riaceous, nerveless : bracts far exceeding the stem. 



Male spikelets 1 to 4 ; female 3 or 4 : perigynium oval or obovate, 

 abruptly ending in a bidentate beak with serrate teeth, 

 biconvex above, strongly nerved, resinously dotted : scales 

 acute or cuspidate : bracts about the length of the stem. 



Male spikelets 1 or 2 ; female 3 or 4, remote : perigynium oval or 

 obovate, lenticular-compressed, sparingly toothed on the 

 upper margins, nearly entire or bidentate with serrate 

 teeth, punctate, more or less nerved : scales ciliate, acute 

 or awned : bracts far exeeeiling the stem. 



Spikes long-cylindrical ; male 1 or 2 ; female 4 to 8 : perigynium 

 ovate, rostellate, emarginate, nerved: scales purple, broadly 

 ovate, emarginate, 3-nerved, cuspidate : bracts much longer 

 than the stem. 

 Stigmas 3. 



I'erigynium beakless or short-beaked, the orifice entire or emarginate 

 or bidentate. 



Perigyniujn smooth. 



Stem obtusely angled : sjiikes oblong ; male 1 ; female 1 or 2, 

 rarely 3 : perigynium ovoid, obtusely angled, ending in a 

 short straight point, nerved, granular. 52. C. livida. 



Stem sharply angled : leaves and bracts broad : spikes cylin- 

 drical, 4 or 5 ; male 1 ; female loosely flowered : perigyn- 

 ium ellipsoidal, many-nerved, acute at each end, erect or 

 bent at the apex, the orifice hyaline and entire. 53. C. laxiflora. 



Spikes 3 to 6, ellipsoidal or club-shaped ; male 1, rarely 2 ; the 

 lower female pednn(de(l, pendulous : perigynium oval or 

 ovate, abruptly rostellate with entire or liidentate beak, 

 obscurely nerved. 54. C. roDOCAlirA. 



Spikes 3 to 6, oblong or obovoid ; male 1 : pcrig}Tiium yellow- 

 ish, obovoid, ventricose, abruptly rostellate with purj)le 

 emarginate beak, nerved, divergent. 55. C. Raynoldsu. 



Spikes 3 or 4, oblong or club-shaped : perigynium elliptical, ros- 

 trate, bidentate, the spreading teeth serrate-toothed. 56. C. sekuatodens. 



Perigynium jnibescent. 



Spikes 2 to_4 ; male 1 : perigynium obovoid, abruptly rostellate, 

 the orifice entire, nerveless : bracts i)urple, leafless, subu- 

 late : scales ciliate. 57. C. Ivichakosoni, 

 Spikes 4 to 6 ; the male 1; the lower female subradical : jieri- 

 gynium globose, tajwring to the base, coriaceous, abruptly 

 rostrate, nerved, bidentate : scales 1 - 3-nerved. 58. C. globosa. 

 Spikes 3 or 4, loosely few-flowered ; male 1 ; lower female sub- 

 radical : perigynium coriaceous, hispid, triangular-subglo- 

 bose, tapering to the obscurely striate base, the beak 

 straight or bent, bidentate : scales clasping, 1 -3-nerved. 59. C. nuEVllTS. 

 Hairy: spikes 2 to 4 ; male 1, often female at top; female 

 cylindrical, loosely flowered, the lower remote on long 

 erect peduncles : perigynium triangular-ellipsoidal, acute 

 nt base, abruptly rostrate, beak bidentate. GO. C. imnis-siMA. 



