cyperacejE. 403 



bractt oiliatc; scales smooth ish ; tubercles ot the perianth in 3 pairs at the base of 

 the shining roughened aehenium. 



Swamps -and hills. July. Culm 9 to IS inches nigh, rough'sh above. Fasciites 

 2 or 3; the lower lateral ones when present peduucled. Adieniun white, rough, 

 with eleyated points. 



Sic. II. Hypopouum, NVes. Feriavlh cone: stamens 1 or 2. 



3. S. VERTIC1LLATA, Mulil. Whorled Nui-rusH. 



Smooth ; culm simple, slender and with the linear leaves smooth ; fascicle 4 to 6V 

 alternate, sessile, distant ; a to, setaceous ; scales smooth ; achenium glo- 



bose, rough-wrinkled, Bho'rt-poini 



Swamps. June — Aug". Culm 6 to 10 inches high, very slender, terminated by 

 an interrupted spike or fascicle of 4 to rather distant sessile dusters. Hoalts 

 purple. 



12. CAREX, Linn. Sedge. 



A classical name of obscure signification. 



Spikes one or several, androgynous, monoecious or rare- 

 ly dicocious. Scales of the spikes 1-flowered, equally im- 

 bricated around the axis. Stamens 3, rarely 2. Style 

 single, included : stigmas 2 or 3, elongated, exscrted. 

 Ovary inclosed in an inflated sac (pcrigynium). Achen* 

 ium lenticular, plano-convex cv triangular, crowned with the 

 lower portion of toe style. — Perennial herbs, chiefly flower- 

 ing in April or Mai/, often growing in wet places, with tri- 

 angular culms,, grassy leaves usually rough on the margins . 

 and heel, and bearing the spikes in the axils of green and. 

 leaf -I ike or scale- 1 the bracts. 



Sec. i. SjpCcea stamhiate at the summit. 



• Stigmas 3. 



1. C. POLYTMCIIOIDES, Mulil. BrisCc-stalhcd Sedge. . 



Culm slender; leaves very narrow, shorter than the culm ; spike, very small, few-, 

 flowered ; pcriyynia erect, alternate, oblong, obtuse, slightly nerved, entire at thv- 

 apex, green, twice the length of the ovate scale. 



Low grounds aud bogs, common. Culm a foot high, very slender. Fertile flout' 

 trs 3 to 8. 



2. C. PELL^X'ULATA, Muhl. Peel uncled Sedge. 



Spikes about 4, on long peduucles, very remote ; sheaths with green tips much . 

 shorter than the stalks ; pcrigynia with along attenuated base, the orifice minuts- 

 ly notched, a little longer th;m the dark purple scale. 



Dry woods and rocky hillsides, rare. Culms 4 to 10 inches high, tufted, prostrate 

 at maturity. 



3. C. UMBELLATA, Schk. UmheUed Sedge. 



Tufted; culms very short; staminate. spilt short, erect, sometimes with a fev» 

 pistillate flowers; fertile spikes 4 or 5, ovoid, few-flowered, the uppermost close tc 

 the sterile spike and sessile, the rest on radical peduncles of about an unequal 

 height; perigynia ovoid, 3-angled, acuminate. 



Rocky hillsides. Culms in dense tufts 2 to 6 inches high. Leaves radical, nar» 

 row, rough; longer than the culm. 



