830 CYPERACE^. (SEDGE FAMILY.) 



sessile or ^jedicelled at the end of the rays or in the head, .005 to .007 

 long, oblong-linear; glumes tawny or greenish, oblong-ovate, keeled, 

 obtusish, mucronulate — Summer — Wet i:)laces ; common. 



10. C. eleusinoideS; Kth. If .6 to 1; root fibrous; culms stout, 

 triquetrous, leafy below. Leaves long-sheathed, linear, flat, rigid, 

 scabrous above. Umbel compound, contracted, rays 7-8, unequal, 

 bearing clustered spikelets; leaves of involucre much longer than rays 

 of involucels, not as long as spikelets ; spikelets densely spilled, linear, 

 lO-lo-flowered; glumes loosely imbricated, keeled, oblong-elliptical, 

 tawny, white -margined, 3-4-nerved on each side, mucronate — Summer 

 — On the borders of the Arundo Donax jungles in Ghor-es-S^fieh. 



11. C. glaber, L. Root fibrous; culms triangular-flattened, 

 leafy below. Leaves flat, sliorter than culm. Umbel often compound, 

 rays 4-8, the central usually short or 0; spikelets crowded into ovate or 

 spherical heads at the tip of the rays, linear-oblong; glumes ovate-ob- 

 long, purplish, icith green Iceel and white margin, 3-nerved on each side, 

 obtuse, mucronulate — Summer — Wet places; common. 



12. C. Papyrus, L. Papyrus. Balir. 11 3 to 4; root-stocic 

 stout, creeping; culms .03 to .05 thick, triquetrous above, with im- 

 bricated, brown sheaths at base, leafless or ending in a broad-lanceo- 

 late limb. Umbel nodding, .4 to .6 broad, equally many-rayed, some- 

 times contracted; leaves of involucre numerous, broad -lanceolate, 

 much shorter than rays ; rays slender, with a long, tubular, truncate 

 sheath at base, and an umbellet of 2-4, unequal pedicels at tip ; leaves 

 of involucel filiform, many times longer than pedicels ; spikelets scat- 

 tered along the pedicels, spreading, linear, .005 to .007 long, teretish; 

 glumes oblong, pale fawn-colored laith a green Iceel — August — Marshes 

 along coast, and about el-Huleh and the Lake of Tiberias ; el-Ghor. 



13. €. loiigus, L. 2X .5 to 1; root-stock creeping; culms tri- 

 quetrous, leafy at base. Leaves linear, rather broad, scabrous, as long 

 as culm or shorter. Umbel compound, with many unequal rays, the 

 pedicels of the umbellets also unequal ; leaves of involucre longer than 

 umbel ; spikelets many-flowered, linear, acute, compressed, in spikes or 

 heads at the ends of the pedicels ; glumes ovate, obtuse, tawny, with a 

 green keel, and 3-5 nerves, and a White margin — Summer — Ditch'es ; 

 common throughout. 



14. C rotiiiidus, L. 2X Trunk short; underground stems elonga- 

 ted, filiform, with ovate-oblong tubers ; culm slender, triquetrous, dense- 

 ly leafy at base. Rays of umbel 3-9, unequal, simple or branching; 

 longer leaves of involucre as long as rays or longer ; sj)ikelets linear, 

 .015 to .045 long, spiked-clustered at the end of the rays; glumes 

 brownish-red, ovate-oblong, obtuse or acutish, with green keel, 3-nerves, 

 and white margins — Summer — Fields and sandy places ; coast. 



15. C e§culeiitii§, L. If Neck scarcely thickened; tinder- 

 ground stems elongated, filiform, with globular tubers ; culm erect, tri- 

 quetrous, leafy at base. Leaves linear, usually as long as culm. Um- 

 bel compound, rays numerous, unequal, the longer often branching; 

 leaves of involucre broad-linear, acuminate, longer than rays ; spikelets 

 spreading, arranged in elustered spikes, oblong to linear, .005 to .01 

 long; glumes loosely imbricated, ovate-oblong, obtuse, straw-colored, 

 with narrow-green keel, many-nerved — Summer — Fields and sandy 

 places; coast. 



