536 CYPERACE^. (sedge FAMILY.) 



* * Scales avmed, green : fertile spikes on nodding peduncles : bracts long and leaj- 

 like : leaves broadly linear. 



18. C. crinita, Lam. Sterile spikes mostly 2, often with fertile flowers 

 intermixed ; fertile spikes 3-4, long-eylindrical, dense-flowered, on long drooping 

 peduncles; pcrigynia round-ovate or obovate, somewhat inflated, 2 nerved, ab- 

 ruptly short-pointed, shorter than the long and rough-awncd scale ; culms rough- 

 angled above (2°-3° high). — Swamps in the ujipcr districts, and northward. — 

 Spikes l^'-3' long. 



19. C. Mitchelliana, M. A Curtis. " Spikes in threes, peduncled, some- 

 what distant, oblong, slightly nodding; terminal spike staminate at the base and 

 summit; the lowest peduncle scarcely sheathed; ])erigynia ovate, acute, glu- 

 brous; scales oblong, the lowest with a long cusp much exceeding the fruit, the 

 upper about ctiualling it. — Wet places, Chatham County, Kortb Carolina." 

 Curtis. — Culm slender, 18' high, rough above. Spikes 1' long. 



§ 2. CAREX Pkoi'EU. Sligtnas 3 ; nut 3-angled. 



A. Spike solitary. 



* Diocious. 



20. C. Boottiana, Benth. Culms slender, naked, rough, shorter than the 

 linear liright-green radiial leaves; spikes (rarely 2) many-fiowered, purplish, 

 cylindrical, erect ; fertile spike dense-flowered ; perigynium obovate, obtuse or 

 abraptly short-beaked, ciliate and 2-tootlKd at the oriflce, nerved, pubescent, cili- 

 ate-toothed on the angles, shorter and narrower than the oblong-acuie or al)ruptly 

 pointed purple scale. — North Alabama, Peters, and westward.— Culms 6' -8' 

 long. Spikes l'-2' long. 



* * Monoecious. Spike sterile above, fertile below. 



21. C. polytrichoides, Muhl. Spike linear, few-flowered; perigynia 

 lanceolate-oblong, many-nerved, obtuse and entire at the apex, twice as long as 

 the oblong mucronate scale ; bract scale-like or occasionally leafy and exceeding 

 the spike; culms tufted, filiform, weak (6' - 12' high), rough above, longer than 

 the very narrow leaves. — Bogs and swamps, Florida, and northward. 



22. C. Praseri, Sims. Spike oblong, many-flowered, the fertile portion 

 globose ; perigynia ovoid, inflated, abruptly short-pointed, longer than the oi)l< ng 

 obtuse hyaline scale; leaves very wide (I' or more), obtuse, serrulate and wavy 

 on the margins, convolute below, and sheathing the base of the naked smt>oth 

 culm. — Shady banks of streams on the mountains of North Carolina. — Leaves 

 6'- 12' long, longer than the culm. 



23. C. Steudelii, Kunth. Spike linear (f/'- 10" long) ; sterile flowers 

 20-25; perigynia 1-4, ovoid, smootii, .3-nerved, abruptly contracted into a 

 slender compressed rough-edged beak, longer than the ovate white grcen-keeUd 

 scale; leaves linear, flat, abruptly pointed, lontrer than the bristle-like prostraic 

 culms. — Shady banks, Florida, and westward. — Culms 3'-G' long. Plant 

 whitish. 



24. C. WilldenOVii, Schk. Sterile flowers 4-8, forming a minute linear 

 spike; perigynia 6 - 9, oblong, with 3 rough angles; lower acales longer than 



