370 ORDER 154. CYPERACE^E. 



the bracts). Perigynia 3-angled, scarce inflated, not much beaked, 

 and (as well as the glumes) more or less colored. . . (p) 

 * Pistillate spikes with peduncles (long or short) scarcely sheathed at 



all, or only the lowest bract on a short sheath. . .(x) 



m Pistillate spikes oblong, brown or hairy, the lowest scarcely sessile. Nos. 8481 

 m Pistillate spikes ovoid, all or mostly solitary on radical peduncles. Nos. 88, 89 



all sessile and crowded on the culm Nos. 90, 91 



all sessile and remote on the cnlm Nos. 92, 93 



n 8 Spikes small (86"), yellowish ; perig. with a short recurved beak. .94, 95 

 n 9 Spikes large ; perigynia much inflated, with a long straight beak. . .(o) 



O Spikes very short. Perigynia 34" long Nos. 9693 



Perigynia 68" long Nos. 9910'* 



o Spikes obloug-cylindric. Perigynia ascending Nos. 103, 104 



Perigynia spreading Nos. 105, 106 



p Leaves radical, very broad (6 10''), triple-veined. $ Spikes clavate. .107 109 



one-veined. $ Spikes linear. .No. 110, )3. y. 

 p Leaves linear or setaceous, 12", rarely 34" wide. ..(r) 

 r Perigynia smooth and not rostrate. . .(s) 

 r Perigynia smooth (scabrous in No. 130) and rostrate. . .(v) 



r Perigynia hairy, veined, conical-beaked. South Nos. 137 139 



s Bracts leaf-like, exceeding the spikes or culm. . .(() 

 s Bracts .shorter than the spikes or culm. . .(&) 



t Perigyuia triangular, oblique at the point Nos. 110 112 



t Perigynia snbterete, straight. $ Spikes pedunculate.. Nos. 113, 114 



$ Spike sessile Noa. 115118 



tt Fertile spikes white in No. 119, tawny In No. 120 



w Fertile spikes green, the sterile pedunculate Nos. 121 123 



v Bracts leaf-like, exceeding the spikes or culm Nos. 125127 



v Bracts not exceeding the spikes or culm. . .(w) 



w Spikes linear, slender, very loose-flowered Nos. 128, 129 



w Spikes cylindric, suberect, rather deie Nos. 130, 131 



w Spikes oblong, about 6-flowered, uense Nos. 13-?, 133 



many-flowered, rather dense Nos. 134 136 



x Perigynia beakless or nearly so. Spikes suberect, short-ped. . . .Nos. 140142 

 Spikes drooping on slender ped.Nos. 143 145 



X Perigynia evidently beaked, diverging in the spike Nos. 146 148 



deflexed in the spike Nos. 149, 150 



** Perigynium clothed with wool, hairs, or mealiness. . .(y) 



** Perigynium glabrous, short -beaked, or evidently longer than its beak., .(z) 



** Perigyuium glabrous, long-beaked, or not longer than its beak... (zz) 



y Perigynia long-beakid. hispid-pubescent, green .. .No. 151 



y Perigynia shorl-beake J, mealy-glaucous, chocolate color No. 152 



densely woolly, greenish Nos. 153, 154 



hispid-pubescent, brown No5. 155, 156 



z Spikes, or at least the glumes, dark-purple or brown Nos. 157 15!) 



z Spikes green or straw-colored. Bracts shorter than the culm No 160 



Bracts exceeding the culm. . .(yy) 



yy 9 Spikes long, densely very many(l 504- )-flowered No. 161 



yy ? Spikes not dense. Perigynia much inflated, 30 to 50. .Nos. 162164 



3 to 12 No. 165 



ZZ Perigynia 3-nerved or nerveless, in drooping spikes No. 166 



zz Perigynia many-nerved, ascending. Peduncles very short Nos. 107170 



horizontal or deflexed Nos. 171, 172 



1 C capitata. L. Spike capitate or nearly globons ; perigynium roundish-ovate, con- 

 vex-concave, glabrous, pointed, longer than the ovate obtuse glume. 6 10'. Wht.Mts. 



