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. 84 91 

 m Pistillate spikes ovoid, all or mostly solitary on radical peduncles. Nos. 88, S9 



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



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



n 9 Spikes small (3 6"), 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 3 4" long Nos. 96 93 



Perigynia 6 8" long Nos. 9910* 



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



Perigynia spreading Nos. 105, 106 



p Leaves radical, very broad (0 10''), triple-veined. $ Spikes clavate. .107 109 



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

 p Leaves linear or setaceous, 12", rarely 31" wide. . .(r) 

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

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



r Perigynia haiiy, veined, conical-beaked. South Nos. 137130 



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

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



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



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



$ Spike sessile Nos. 115118 



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



u Fertile spikes green, the sterile pedunculate Nos. 121123 



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 dense Nos. 130, 131 



w Spikes oblong, about 6-flowered, dense Nos. 132, 133 



many-flowered, rather dense Nos. 134136 



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



Spikes drooping on slender ped.Nos. 143143 



x Perigynia evidently beaked, diverging in the spike Nos. 146148 



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) 



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



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



y Perigynia short-beaked, mealy-glaucous, chocolate color No. 153 



densely woolly, greenish Nos. 153, 154 



hispid-pubescent, brown Nos. 155, 156 



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



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 (150 + )-flo \vered No. 161 



yy ? Spikes not dense. Perigynia much inflated, 30 to 50. .Nos. 162 164 



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. 1(57 170 



horizontal or deflexed Nos. 171, 172 



I C. capitata L. Spike capitate or nearly globous ; perigynium roundish-ovate, con- 

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



