316 North American Cyperaaa. 
style. I am inclined to consider the species as distinct fi'orn 
any other described in thi^ monograph. It may be distin^ 
guished by the name of E. jJroli/era^ 
9. SCIRPUS, R. Brown, 
Scales imbricated on all sides. Bristles of the perigynium 
3 — 6, rigid, persistent, for the most part retrorsely denticulate. 
Style 2^3-cleft, simple at the base, deciduous. Nut bicon- 
vex or triangular. — Culms mostly triangular, simple, often with 
leafless sheaths ; spikes solitary, conglomerated or corymbose, 
terminal or lateral. 
Scirpus, R. Bromn, lyrodr. 1. p. 223; Lestib. ess.fam. Cyp. 
p. 42. no 53; Nees ab Esenb. in Wight'' s contrib. p. 71, aitd 
in LinncBa, 9. p. 293. 
Heliophylax, Lestib. I. c. no. 51. 
Species of Scirpus, Linn., Kimth, Sjjreng., Nutt. &c. 
§. 1. Spike solitary, terminal. 
1. Scirpus planifolius, Muhl. 
Culm triquetrous ; leaves flat, linear, nearly equalling the 
culm ; spike oblong, compressed ; scales carinate, cuspidate, 
the lowest one longer than the spike ; nut triangular. 
Scirpus planifolius, Mulil. ! gram. p. 32; Torr.l jl. 1. p. 46; Big. 
Jl. Bast. ed. 2. p. 20; Beck! hot. p. 424 ; Bart. x>rodr. fl. Phil. 1. p. 33 ; 
Darlingt.! fl. Cest. ed. 2. p. 20; Schult. mant. 2. p. 72; Sjneng. syst. 
1. p. 206. 
Isolepis planifolia, Spreng.! neue entd. 3. p. ]0. 
Eleocharis planifolia, N. ah Escnb. in LinncEa. 9. p. 294. 
Culms cespitose, about a span high, acutely triangular, scabrous on 
the angles. Leaves gramineous, tapering to a long, rather obtuse point, 
carinate, scabrous on the margin ; the lowest ones shorter and broader. 
Spike at first lanceolate, but at length somewhat ovate, 6 — 7-flowered. 
Scales somewhat trifarious, ovate-lanceolate, yellowish, with a green 
