352 North Amcncnn Cyperacea. 



5. IsOLEPlS CILIATIFOLIUS. 



Culm angular and somewhat compressed, striate ; leaves se- 

 taceous, shorter than the culm, serriilate-ciliate ; umbel com- 

 pound, diverging; rays mostly longer than the involucre; spikes 

 ovate, 5 — 6-flowered; scales ovate, somewhat acute; stamens- 

 2 ; nut obovate, triangular, obtuse, roughened with minute 

 papillae. 



Scirpus cilialifolius, Elliott ! sk. 1. p. 82, (excl. sj^n.). 



Culm 6 — 12 inches high, very slender, a little scabrous to-svards the 

 summit. Leaves setaceous, channelled, mostly radical, fringed with 

 minute rigid processes. f//?(6e/ terminal, 3 — 4-rayed ; the primary rays 

 nearly an inch long; partial umbels of 3 — 4 spikes. Involucre 2 — 3- 

 leaved, setaceous, one of the leaves about as long as the umbel, the others 

 very short. Sjnkes a line in length, rather acute. Scales with a short 

 abrupt point, ferruginous, ciliate towards the summit. Stamens 2. Style 

 filiform, equally 3-cleft; the divisions glandularly pubescent. Nut 

 acutely triangular, of an obscure bluish colour, roughened witli minute 

 elevated dots and very obscurely rugose transversely. 



Hab. Damp soils in the Southern States. Wilmington, 

 North Carolina, Mr. Curtis!; South Carolina, Elliott!; 

 Alabama, Dr. Gates! ; Middle Florida, Dr. Chapnan ! 



Obs. Easily distinguished from /. cainllaris by its larger 

 size, compound umbel, much smaller spikes and papillose nut. 



Sprengel refers, with a mark of doubt, Scirp. ciliatifoUus of 

 Elliott to FiinJ}. pilosa^ Vahl, but the two plants are totally 

 distinct. 



6. ISOLEPIS COARCTATA. 



Culm filiform, somewhat terete, nearly naked; leaves seta- 

 ceous, with bearded sheaths ; umbel compound, contracted, a 

 little shorter than the longest leaf of the involucre; spikes linear- 

 oblong, angular, 10 — 15-flowered; scales ovate, somewhat 

 acute ; stamens 2 ; nut triangular, subcompressed, depressed 

 ;,.t the summit, obscurely papillose, shining. 



