IIe;uI of Sciiitii? mucronatus. 

 (a) Culm. (6) Base of rcf1exc<l 

 process of culm. 



CYPERACEiE. (SEDGE FAMILY.) 833 



head, .02 iu diameter, long-overtopped by Fic. 307. 



the triquetrous, at length dejlexed, continu- 

 ation of the culm ; glumes longitudinally 

 striate, huff-colored, ovate, concave, obtuse, 

 mucronate, entire. Akene transversely 

 wrinkled, mucronulate— Summer — ^Marshy 

 places; Abeih (Mt. Lebanon). 



6. S. laciistri§, L. If 1 or more; 

 root-stock stout, creeping; culms stout, 

 terete, the uppermost sheath ending in <i 

 short lamina. Spikelets ovoid-oblong, 

 .008 to .01 long, many-flowered, arranged 

 in a lateral, cymose, several times com- 

 pound umbel, with unequal rays; the 

 continuation of the culm subulate, shorter 



than rays or a little longer; glumes brown, ovate, retuse, mucronate, 

 the back obliquely wrinkled, the margins more or less fringed ; akenes 

 triquetrous, smooth — Summer — Marshes and ditches ; coast. 



7. S. iiUorali§, Schrad. If .6 to 1; root-stock stoloniferous, 

 fibrous; culms triquetrous, the sheaths of the young culms ending in 

 linear-lanceolate leaves, those of older culms nearly leafless. Spikelets 

 numerous, ovate-oblong, .000 to .008 long, in a lateral, cymose, com- 

 pound umbel, with unequal rays; the continuation of the culm erect, 

 triquetrous, longer than inflorescence ; glumes ovate, brown, obtuse or 

 retuse, mucronate; stigmas 2; al^ene plano-convex — Spring — Banks of 

 stream near Haifa; Syria (Kth.) 



* * Inflorescence terminal, cymose-umbelled. 



8. S. maritiinu§, L. If 1 to 2 ; root-stock Fig. 368. 

 creeping, tuberiferous ; culms triquetrous, 

 leafy. Leaves flat, keeled. Spikelets iroicn 

 orluff, ovate-oblong, .01 to .015 long, in a 

 terminal head, or an unequally short or long- 

 rayed, simple or compound umbel, subtended 

 by an involucre longer than rays; glumes 

 ovate, acutely lifid, with an awn in the sinus ; 

 stigmas 3; akenes glossy, triquetrous — Sum- 

 mer — Ditches and swamps ; common through- 

 out. 



Var. biformis, Post. Spikelets on the 

 same plant, some of the typical form, and others 

 in separate umbels cylindrical, .03 to .035 long, 

 .005 in diameter — Ditch; Mejdel-Shems 

 (Hermon). 



* * * Inflorescence terminal, sjnkelets 3-4 in a 



head icithout involucre, but each subtended by a 



bract with an aion a Utile longer than spilelet. 



9. S. L.il>aiioticus, Post. If .5; root- 

 stock creeping; culms erect, triquetrous, 

 leafy. Leaves flat, keeled, sheath hairy. 

 Spikelets ovoid-oblong, .005 to .007 long, 

 short-peduncled or sessile in a terminal head, 

 each subtended by an ovate, obtuse, membran- 



108 



Inflorescence of Scirpus 

 Lil)a^oticu^=. 



