834 



CYPERACE^. (sedge FAMILY.) 



ous bract, with awn as long as or a little longer than spikelet; 

 glumes oblong, obtuse, puberulent, aristate; stigmas 3; akenes tri- 

 quetrous, glossy, one-third as long as glume — October ~ 'Ain-Zehalta 

 (Lebanon). 



* * * * Iiifloj'esccnce terminal, spikelets in a two-ranked, terminal Sjnhe, 

 siibtended h/ a single involucre leaf, longer than spike. 



10. S. conipre§SH§, L. If .2 to .3; root-stock creeping, stolon- 

 iferous; culms compressed-terete, angled above. Leaves rather 

 remote, linear, long-taperiug, keeled below. Spikelets 6-8-flowered, 

 spindle-shaped, .006 to. 008 long, acute, crowded into an oblong spike, 

 .03 to .03 long, .006 to .008 broad, sometimes interrupted at base ; 

 glumes nearly 4-ranked, oblong to oblong-lanceolate, brown, many- 

 nerved; style exserted, bifid; akene ellipsoid, compressed, finely reticu- 

 lated — September — Alpine Lebanon. 



Spikelets compressed, 2-3-flowered; flowers all fertile. Glumes 

 nearly 2-ranked, imbricated, the lower few sterile. Perigynous bristles 

 3-5 or 0. Style continuous with ovary, deciduous. 



I§. nigricans, L. 2^ .5; tufted, root-stock Fig. 369. 



horizontal; culms rigid, terete, leafy at base and 

 surrounded there by the blackened, glossy sheaths 

 of withered leaves. Leaves filiform, grooved, 

 from a broad sheath, half as long as culm. 

 Spikelets 5-10, lanceolate, compressed, 1-3- 

 flowered, crowded into a terminal head ; bracts 

 2, dilated at base, subulate at tip, the lower 

 longer than head; glumes chestnut becoming 

 blackish, lanceolate, keeled; akene white, 

 smooth, glossy, triquetrous, — April and May — 

 Grassy and sandy places ; common. 



6. CJLADItJM, R. Br. TwiG-Ru.sn. 



Spikelets 1-2-flowered, in a compound pani- 

 cle, one flower in each spikelet fertile. Glumes 

 imbricated, 3-ranked, keeled, 5-6, the lower 

 three empty; hypogynous bristles 0. Akene 

 furnished with a crustaceous rind. 



C. Mariscus, L. It HaJfd. 1 to 2; root- 

 stock indurated, creeping, * stoloniferous ; culms inflorescence of 

 jointed, leafy, stout, terete, the upper segments tschjenus nigricans, 

 grooved on alternate sides. Leaves linear, rigid, rough at margins and 

 keel. Corymbs in lateral and terminal panicles, .2 to . 25 broad ; spike- 

 lets clustered, ovate-oblong; glumes ovate, keeled, rust-colored, the 

 lower shorter; stamens usually 2; akene ovate, apiculate, turning black 

 — Summer — Ditches and marshy places. 



•7. CAREX, L. Sedge. 



Flowers monoecious or dicecious, in spikelets of one or both kinds 

 of flowers, which are solitary at the axil of the glume. Staminate 

 flowers : stamens 3, included. Pistillate flowers : utiicle consisting of 2, 

 connate pales or scales, contracted at tip, including the ovary. Style 

 1, stigmas 3-3, exserted from mouth of utricle. Akene compressed 



