Order "155.— CYPERACKjE. 74 7 



lateral, if any, pedunculate; bracts foliaceou3, ciliatc; spikes in pairs; glumes 

 membranous, mucronate, somewhat ciliate; sty. 3-cleft; ach. globous, rougi, 

 white and shining ; p irig. a narrow ring upon tohich arc G rowuiish, minute tubercles. 

 — Wet or dry soils, N. 1L to Ohio and Fla. Aug.— There are several well marked 

 varieties. 



0. Very slender, smootiiish; lateral fascicle 1 -flowered, sessile, or none. — Masa 



to Ohio. About If high. 

 y. Very slender, scabrous-hirsuto ; lateral fascicle 1 to 2-flowered, sessile ; 

 lower bracts much exceeding the culm. — Ga. and Fla. (3. Carolina 

 Willd. ?) 

 <5. Stouter, tall (2 to 3f high), edges denticulatc-ciliate ; lateral fascicles on 

 short (1 to 2') peduncles. — S. States. 



5 S. reticularis Mx. St. 1 — 2f high, triangular, rather slender; lvs. 1" wide, 

 channeled, radical G — 12' long, cauline few; fascicles 2 — 5, lateral and terminal, 

 distant, loose-flowered, subsjssile ; spikelets somewhat in pairs, the £ many- 

 flowered, at the base of the ^ ; glumo light brown, ovate acuminate ; sta. 2 -, 

 perig. 3-lobed ; ach. globous, of a dead white, §" diam., conspicuously reticulated 

 and deeply pitted. — Borders of ponds, R. L (Olney), to Fla. The achenium is a 

 curious and beautiful object 



6 S. laxa Torr. St 1 — 2f high, weak, diffuse, acutely triangular, slender; lvs. 

 flat, 2" wide, smooth ; fascicles about 3, open one terminal, the others lateral ami 

 very remote; ped. 2 — G" long, compressed, slender, often recurved; spikelets dis- 

 tant, in pairs, the sterile at the base of the 5 ; sta. 2 ; perig. deeply 3-lobed ; ach. 

 about 1" diam., globous, whitish, marked with brownish, papillous transverse 

 ridges and pits. — Near the sea coast, N. J. to Fla. Sept. (S. reticularis Muhl.) 



7 S. verticillata Muhl. St. G — 8 — 12' high, triquetrous, slender, glabrous; lvs. 

 linear, narrow and flat, shorter than tho stem ; fiscicles smooth, purple, 4 — 6, sessilo, 

 few-flowered, appearing as if verticillato ; bracts minute, setaceous, about as long 

 as the fascicles, scabrous upward; scales of $ ovate, smooth, scabrous and 

 keeled ; ach. globous, rugous, a little more than V' diam., abruptly mucronate and 

 somewhat 3-sided at base. — Very abundant in Junius, N. Y. (Startwell) to Car., 

 TV. to Ohio (Sullivaut). (Hypoporum vertieillatum Nees.) 



C S: interrupta Mx. Pale green, sparingly hirsute; oulin 3-angled, 12 to 30' 

 high; lvs. linear, flat, striate, 3-veined, much shorter than the culm; fascicles 

 few-flowered, 5 to 7, alternate, approximate at the summit forming an interrupted 

 spike 2 to 3' long; glum's conspicuously cuspidate and brislly-ciliate, rusty brown ; 

 ■ach. \ ' long, smooth, purplish ivhite, 3-sidcd and fluted at base. — N. Car., Fla. 

 and La. 



9 S. gracile. Filiform, smooth, 1 to 2/ high; culm 3-anglod; lvs. few, shorter; 

 spilces 3" hng, few (1 to 5 pairs), in a terminal fascicle ; glumes ovate, mucronate, 

 purplish brown ; bract erect as if a continuation of the culm; stam. 3j ach. 1" 

 long, white, ovoid, obscurely 3-angled, longitudinally ribbed. — S. Ga., Fla to 

 Texas. (Hypoporum Torr.) 



20 S. Baldwinii. Culm sharply Z-angkd, edges scabrous, jointless, 2 to 3/ high ; 

 lvs. radical, long, linear, keeled; spikes 3 to 5 pairs, 5" hug, in a terminal fas- 

 cicle; bracts 3, the longest ereet, all purple at base; glumes brownish purple, 

 lanceolate, acuminate; stam. 3; ach. largo (near 2" long), ovoid, dull, even, 

 whitish. — Ga. and Fla. (Chapman.) 



13. CAREX, L. Sedge. (The classical name, perhaps from Lat. 

 earco, to hick; referring to the sterile spikelets.) Fls. diclinous; spikes 

 1 or more, either androgynous (with both staminate and pistillate fls.), 

 or with the two kinds in separate spikes on the same plant (monoecious) 

 or rarely on separate plants (dioecious) ; glumes single, 1-flowered, 

 lower ones often empty; <$ stamens 3; $ stigmas 2 or 3 ; perigynium 

 (of 2 united scales) of various forms, persistent, enclosing the lenticular 

 ©r triangular achenium. — 2£ Culms triangular, growing ia tufts. 



