504 CYPKllACK.-li:. (SKIXJE FAMTI.V.) 



as tlie olilong miuTonate scale; bract scale-like or occasionally leafy and ex- 

 cct'tlirig the spike; ciihns tufted, filiform, \\c:il< (f/-12' Iiigli), roupli at)ove, 

 longer tiian tJie very narmw iwivcs. — lio^s and swamjis, common. 



23. C. Fraseri, Andrews. .S|)iko nldung, many-Howercd, the fertile por- 

 tion glohose ; ])crii;ynia ovi)id, inflated, abruptly .short-puinted, longer than 

 the oblong obtuse hyaline .scale; leaves very wide (1' or more), obtuse, serru- 

 late and wavy on the margins, convolute below, and sheathing the biise of tlie 

 naked smootli culm. — Shady banks of .streams on I lie mountains of North 

 Carolina. — Leaves C- 12' long, longer than tlie culm. 



24. C. Jamesii, .Schw. ? Spike linear (f)"-10" long); sterile flowers 

 20-25; ju'rigynia 1 -4, ovoid, smooth, 3-nerved, abru])tly contracted into a 

 slender compressed rough-eilged beak, longer thau the ovate white green- 

 keeled .scale ; loaves linear, flat, abruptly pointed, longer than the bri.stle-like 

 prostrate culms. — Shady banks, Florida, and westward. — Culms 3' - 6' long. 

 J^lant wjiitish. 



2.5. C. Willdenovii, Schkr. Sterile flowers 4 - 8 ; perigynia 6 - 9, ol)- 

 long, the lower much sliorter than the leafy green scale ; otherwise like the 

 last. — Mountains of North Carolina, and northward. 



« * Dicecious. 



26. C, Boottiana, Benth. Culms slender, naked, rough, shorter than 

 the linear bright-green railical leaves; spikes (rarely 2) many-flowered, pur- 

 plish, cylindrical, erect; fertile spike dense-flowered ; perigynium obovate, ob- 

 tuse or abruptly short-beaked, ciliate and 2-toothed at the orifice, nerved, 

 pubescent, ciliate-toothed on the angles, shorter and narrower than the oblong- 

 acute or abruptly pointed purple scale. — North Alabama (Peters), and west- 

 ward. — Culms 6'- 8' long. Spikes 1'- 2' long. 



2. Splices t)co or more (rarelji solitary). 



* Culms with a sterile and fertile spike from a terminal leafless sheath, and two 

 or more fertile ones in the axils of the radical leaves. 



27. C. Baltzellii, Chapm. Sterile spike rigid, often with a few fertile 

 flowers at the liase ; fertile sjiikes 3-6, linear-cylindrical, closely many- 

 flowered, one (rarely two) on an erect peduncle which is included in a leafless 

 sheath at the base of the sterile spike, the others on long recurved or spread- 

 ing radical peduncles, commonly sterile at the summit ; perigynia obovate- 

 oblong, pubescent, abruptly short-pointed, as long as the obovate obtuse 

 miicronate reddish brown scale. — Dry sandy soil. Middle Florida. — Leaves 

 all radical, 2" -4" wide, glaucous, very rough above, longer than the culm. 



« * Terminal spike sterile below (often wholli/ so in Nos. 29 and 41), fertile 

 above, the others chiefly fertile. 



■i- Periqi/nio inflated, contracted into a long and slender beak. 



28. C. squarrosa, L. Spikes l-4, oval, thick (^'-1'), erect, pedun- 

 cled ; perigynia horizontal, obovate, smooth, 3-uerved, abruptly contracted 

 into a long subulate smooth 2-cleft beak, longer than the lanceolate acute 

 scale. — Swamps and meadows, near the mountains, Georgia, and northward. 

 Culms 8' - 16' high, shorter than the linear leaves and bracts. 



