Order 155.— CTPERACE-ffi. 747 



lateral, if any, pedunculate; bracts foliaceous, ciliate; spikes in pairs; glumes 

 membranous, mucronate, somewhat oUiate ; sty. 3-cieft ; aoh. globous, rough, 

 white and shining ; perig. a narrow ring upon which a/re 6 roundish, minute iuberdes. 

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

 varieties. 



. (8. Very slender, smoothish ; lateral fascicle l-flowered, sessile, or none. — Mass. 

 , to Ohio. About If high. 



y. Very slender, soabrous-hirsuts ; lateral fascicle 1 to 2-flowered, sessile ; 

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

 Willd. ?) 

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

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



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

 channeled, radical 6 — 12' long, cauline few; fascicles 2 — 5, lateral and terminal, 

 distant, loose-flowered, subsessile ; spikelets somewhat in pairs, the S many- 

 flowered, at the base of the ^ ; glume 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. I. (Olney), to Pla. The achenium is a 

 curious and beautiful object. 



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

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

 very remote ; f>ed. 2 — 6" long, compressed, slender, often recurved ; spikelets dis- 

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

 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. vertioillata Muhl. St. G — 8 — 12' high, triquetrous, slender, glabrous; Ivs. 

 linear, narrow and fiat, shorter than the stem ; fascicles smooth, purple, 4 — 6, sessile, 

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

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

 keeled ; adi. globous, rugous, a little more than -J-" diam., abruptly mucronate and 

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

 W. to Ohio (Sullivant). (Hypoporum verticiUatum Nees.) 



8 S. interrdpta Mx. Pale green, sparingly hirsute ; culm 3-angled, 12 to 30' 

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

 few -flowered, 5 to 1, alternate, approximate at the summit forming an interrupted 

 spike 2 to 3' long ; glumes conspiouously cuspidate and bristly-ciliate, rusty brown ; 

 ach. -J-'' long, smooth, purplish white, 3-sided and fluted at base. — ^N". Car., Fla. 

 and La. 



9 S. graoile. Filiform, smooth, 1 to 2f high; culm 3-angled ; Ivs. few, shorter; 

 spikes 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. 3; ach. 1" 

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

 Texas. (Hypoporum Torr.) 



10 S. Baldwinii. Oulm sharply S-angled, edges scabrous, jointUss, 2 to Sfhigh; 

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

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

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

 whitish. — Ga. and Fla. (Chapman.) 



i8. CAREX, L. Sedge. (The classical name, perhaps from Lat. 

 careo, to lack ; referring to the sterile spikelets.) FIs. 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 (moncscious) 

 or rarely on separate plants (dioscious) ; glumes single, l-flowered, 

 lower ones often empty; ,5 stamens 3; $ stigmas 2 or 3 ; perigynium 

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

 or triangular achenium. — 2f Culms triangular, growing in tufts. 



