CYPERACEJE. (SEDGE FAMILY.) 835 



or triquetrous, included iu the growing utricle — Perennial herbs, 

 with spikelets solitary, or arranged iu a spike or panicle. In some 

 species the utricle encloses a small awn at the base of the ovary. 



* Spikelets androgynous, arranged in a continuous or interrupted S2nke, or 



panicled, each subtended dy a Iracilet. Stigmas 2. 



X SpiJcelets staminate at tip. 

 X Boot stoloniferous or creeping, 

 1 C. stenophylla, 2 divisa. 



X X Roots fibrous, leaving tufts. 

 3 C. vulpina, 4 muricata, 5 divulsa. 



1 1 SpiTcelets staminate leloic. 

 G C. remota. 



* * SpiTzelets numerous, the terminal or upper ones staminate, the lower 

 pistillate. Iftliey are mixed, the pistillate fiotcers are more numerous. 



t Spikelets normally either all or tJie upper ones androgynous at tip. 



7 C. Linkii, 8 eremitica. 



1 1 Spikelets normally each loith only one kind of flower. 

 \ Utricle with a short, terete, olliguely truncate orretuse leak or 0. 



9 C. glauca, 10 Mediterranea, 11 echinata, 13 maxima, 13 acuta. 



:!: X Utricle loith a more or less elongated, terete or compressed, Ufid or U- 



cuspid leak. 



14 C. sylvatica, 15 extensa, 16 distans, 17 paludosa, 18 riparia. 



1. C, stenopliylla, Wahl. If .1 to .2; root-stock stoloniferous; 

 neck fibrous. Leaves filiform, conwlute-grooved, usually curved, shorter 

 thau culm. Spikelets 3-6, crowded into a rounded, o'oate, or oUong, 

 tawny to blackish spike, .01 to .02 long, the upper spikelets staminate; 

 bracts mucronate to cuspidate; glumes ovate, obtuse or acute, white- 

 margined; utricle ovate, plano-convex, 9-11-nerved, ending in a short 

 beak, with serrulate-scabrous margin, and membranous, retuse mouth 

 — Spring — Moist places, coast to middle, subalpine, and alpine regions, 

 and interior plateaus. 



Leaves flat — Borders of et-Tih ; Jeru- 

 -leppo ; Syrian Desert. 



2. C. divisa, Huds. 2f Sdrad. .2 to .6; root-stock creeping. 

 Leaves firm, flat, linear, tapering, often as long as erect, triquetrous 

 culm. Spike compound, ovate to oblong, .01 to .04 long, the upper 

 spikelets staminate, all close together, or the lower separate; lower 

 bracts long-aristate, sometimes as long as spike ; glumes buff to tawny, 

 keeled, acute or mucronate; utricle ovate, plano-convex, obsoletely 

 nerved, ending in a short, bidentate beak— Spring — Moist places; 

 common throughout ; Arabia Petrsea. 



3. C. TUlplna, L. 2f .4 to .G; root-stock oblique. Leaves 

 grass-like, keeled, rough, .005 to .007 broad, as long as the acutely 

 triquetrous stems. Spike compound, .03 to .08 long, .008 to. 01 thick, 

 oblong, dense or interrupted; spikelets many-flowered, sometimes 

 compound, all or the loioer with long, setaceous Iracts ; glumes green or 



