OHDKR 155. CYPERACEJ3. 749 



7 8. Pistillate spikes with enclosed or nearly enclosed peduncles. Pcrigynia 

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



r Perigymuin pubescent, brownish, abruptly beaked Nos. 93, 9J 



r Perigyniuin smooth, yellowish, with a short, recurved beak Nos. 100, 101 



p Perigynium smooth, inflated, with a long, straisrht beak, (s) 



S Spikes very short. Whole plant yellowish green Nos. 102104 



Whole plant dark green or bright green Nos. 105, IOC 



a Spikes oblong-cylindric, very large, Perig. conic- rostrate Nos. 107109 



middle size, very abruptly rostrate No. 110 



1 9. Pistillate spikes with cxserted peduncles. Perigynia 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 Mr wide, (u) 



u Pcrigyniuin acuminate with a recurved point Nos. 111113 



u Perigyn. acute or obtuse. Lvs. lanceolate, shorter than culms Nos. 114, 115 



Lvs. lance-linear, long as culms Nos. 116, 117 



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

 V Perigynia smooth and not rostrate, (w) 



w Bracts all exceeding the oblong, dense spikes Nos. 118, 115 



slende'r, loose spikes Nos. 120, 121 



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



X. Leaves setaceous and all radical. Glumes white No. 122 



x Leaves linear. Spikes blackish. "White Mts No. 123 



Spikes tawny Nos. 124, 125 



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



Glumes umcronate Nos. 128, 125 



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



y Bracts leafy, exceeding the stem and fruit Nos. ISO 132 



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



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



Z Spikes cylindrical, rather close, 3 in number Nos. 185, 136 



Z Spikes oblong, 6 to OO-fld. Culm 4 to 6'hish, very delicate.. No. 187 



Culm 1 to 2f high Nos. 133 U) 



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



sterile spike oval-oblong Nos. 143,144 



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



aa Spikes all erect. Perigynia not rostrate or but slightly so Nos. 145147 



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



Perig. rostrate (few), spindle-shaped, 2-toothed No. 153 



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

 bb Perigynia not rostrate. Spikes ov< 



roid, thick Nos. 151153 



Spikes linear or cylindric Nos. 154, 155 



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



the beak long and 2-parted Nos. 157159 



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

 CC Perigynia clothed with wool, hairs or mealiness, (dd) 



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



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



densely woolly, greenish Nos. 162, 163 



hispid pubescent, brown Nos. 164, 165 



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

 ee Spikes (?) on exscrted peduncles, (ff ) 



ff Glumes dark brownish purple. Bracts shorter than culm No. 166 



ff Glumes greenish or tawny, or yellowish, (gg) 



gg Perigynium tapering into very short beaks Nos. 167, 16S 



gg Perisynium long-beaked, horizontal or reflexed Nos. 169, 170 



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



Beak cylindric.Nos. 173, 174 



60 Spikes ( 9 ) on sheathed, or very short peduncles, or sessile. (b.h) 

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



kk Perfgynium short-beaked or beakless. Kanknquatics.Nos. 175, 17(5 



kk Perigynium decidedly beaked. Glumes awncd Nos. 177, 178 



Glumes lanceolate. Nos. 179, 180 

 frh Spikes oblong or oval, tnrgid, length not thrice the diam. (nn) 



nn ? Spikes 2 or 3 iu number. Beak cylindric Nos. 181, 182 



Beak conical No. 1SJ5 



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



sessile, small. Beaks conical No. 186 



I. Stigmas 2 -Achenium double convex. 



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

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

 longer than the ovate and rather obtuse glume ; Ivs. slender. Heights of th 

 White Mts. (Robbins). 



2 C. gynocrates Wormesk. $ Spike oblong, rather loose-flowered ; perigynium 



