Obder 155.— CYPERACEjE. 749 



T 8. Pistillate spikes with enclosed or nearly enclosed peduncles. Perigynia 

 mostly inflated, beaked, angular -struts Spikes often quite large, (r) 



r Pertgylliinn pubescent, brownish, abruptly beaked Nos. 99, 99 



r IVrigynium smooth, yellowish, With a, short, recurved beak Nos. 100,101 



r Perigynium smooth, inflated, w ith a long, straight beak, (s) 



S Spikes very short. — Whole plant yellowish green Nos. 102 — 104 



—Whole plant dark green or bright green Ros. 105, 1U6 



3 Spikes oblong-cylinUrie, — very large, conic-rostrate Nos. 107 — 109 



— middle size, very abruptly rostrate No. 110 



T 0. Pistillate spikes with exserted peduncles. Pcrigynia 3-angled, scarce inflated, 

 not much beaked, and (as well as the glumes) more or less colored, (t) 

 t Leaves lanceolate or lance-linear, 4 to 10' wide, (u) 



u Perigynium acuminate with a recurved point Nos. 111 — 113 



U Perigyn. acuto or obtuse. — Lvs. lanceolate, shorter than culms Nos. 114, 116 



— Lvs. lance-linear, long as culms. Nos. 116, >17 



Leaves linear or setaceous (1 to 2" wide or less), (v) 



V Perigynia smooth arid not rostrate, (w) 



W Bracts all exceeding the— oblong, dense spikes Nos. 118, 119 



— slender, loose spikes Nos. 120, 121 



W Bracts shorter than the spikes or culm, (x) 



X Leaves setaceous and all radical. Glumes white N«. 122 



X Leaves linear. — Spikes blackish. White Mts No. 123 



— Spikes tawny Nos. 124, 125 



— Spikes green. — Gl. (mostly) obtuse. ..Nos. 126,127 

 — Glumes mucronate Nos. 12S, 129 



V Perigynia smooth (scabrous in No. 135), rostrate, (y) 



y Bracts leafy, exceeding the stem and fruit Nos. ISO — 133 



y Bracts not exceeding the stem or fruit, (z) 



2 Spikes linear, slender, quite loose-flowered Nos. 133, 134 



Z Spikes cylindrical, rather close, 3 in number Nos. 135, 136 



Z Spikes oblong, 6 to OO-ild.— Culm 4 to 0' hitrh, very delicate.. No. 137 

 —Culm 1 to 2f high Nos. 13S— 14ft 



V Perigynia hairy, — sterile spike linear, slender Nos. 141, 142 



— sterile spike oval-oblong Nos. 143,144 



T 10. Pistillate spikes with peduncles (long or short), scarcely sheathed at all. (aa) 



aa Spikes all orect. — Perigynia not rostrate or but slightly so Nos. 145 — 147 



— Perigynia rostrate, the orifice entire, or nearly so Nos. 148, 149 



— Perig. rostrate (lew), spindle-shaped, 2-toothed No. 150 



aa Spikes (the pistillate) soon mostly nodding, (bb) 



bb Perigynia not rostrate. — Spikes ovoid, thick Nos. 151 — 158 



— Spikes linear or cylindric Nos. 154, 155 



bb Perigynia rostrate, — the beak short, scarcely 2-toothed No. (161) 156 



— the beak long and 2-p'arted Nos. 157 — 159 



H. Staminate xpikex usually 2 or more. Perigynia rostrate, (cc) 

 " co Perigynia clothed with wool, hairs or mealiness, (dd) 



dd Perigynia long-beaked, hispid-pubescent. 2-cIeft, green No. 160 



dd Perigynia short-beaked, — mealy glaucous, chocolate-colored No. 161 



— densely woolly, greenish Nos. 162, 1 63 



— hispid pubescent, brown Nos. 164, 165 



CO Perigynia glabrous (or merely scabrous in No. 172). (ee) 

 ee Spikes ( 9 ) on exserted peduncles, (ff ) 



ff Glumes dark brownish purple. Bracts shorter than culm No. ICO 



ft' Glumes greenish or tawny, or yellowish. (gg) 



gg Perigynium tapering into very short beaks Nos. 167, 168 



gg Perigynium long-beaked, horizontal or rellexed Nos. 169, 170 



gg Perigynium long-beaked, ascending. — Beak conical. .Nos. 171, 172 



— Beak cylindric.Nos. 173, 174 

 ee Spikes ( 9 ) on sheathed, or very short peduncles, or sessile, (hh) 

 hb. Spikes cylindrical, length more than thrice diam. (kk) 



kk Perigynium short-beaked or beakless. Bank aquatics.Nos. 175, 178 



kk Perigynium decidedly beaked. — Stones awned Nos. 177, 178 



— Glumes lanceolate. Nos. 179, 180 

 hh Spikes oblong or oval, turgid, length not thrice the diam. (nn) 



nn 9 Spikes 2 or 3 in number.— Beak cylindric Nos. 181, 182 



— Beak conical No. 183 



nn 3 Spikes 1 or 2,— pedunculate. Beaks cylindric Nos. 184, 1S5 



— sessile, small. Beaks conical No. 184 



I. Stigmas %— Adienium double convex. 



1 C. capitata L. Spiko capitate or nearly globous, $ at tho summit; fr. (peri- 

 gynium) roundish-ovate, close compressed, convex-concave, glabrous, acutish, 

 longer than the ovate and rather obtuso glume ; lvs. slender. — Heights of tho 

 White Mts. (Robbins). 



2 C. gynocrates "Worraosk. S Spiko oblong, rather loose-flowered ; perigynium 



