316 North American Cyperacea. 



style. I am inclined to consider the species as distinct from 

 any other described in this monograph. It may be distin- 

 guished by the name of JS. jprolifera. 



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. Brown, prodr. 1. p. 223; Lestib. ess.fam. Cyp. 

 p. 42. no 53; Nees ah Escnh. in Wighfs contrih. p. 71, and 

 in LinncBa, 9. p. 293. 



Heliophylax, Lestib. I. c. no. 51. 



Species of Scirpus, Linn., Kunth, Spreng., Nutt. &c. 



"^. 1. Spike solitary, terminal. 



1. Scirpus planifolius, Mufd. 



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.! fl. 1. p. 46; Big. 

 Jl. Bost. ed. 2. p. 20 ; Beck I hot. p. 424 ; Bart, prodr. fl. Phil. 1. p. 33 ; 

 Darlingt.! fl. Cest. ed. 2. p. 20; Schult. mani. 2. p. 72; Spreng. syst. 

 1. p. 206. 



Isolepis planifolia, Spreng.! neue entcl. 3. p. 10. 



Eleocharis planifolia, N. ah Esenb. in Linn^a. 9. p. 294. 



Cubns 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, ©vate-lanceolate, yellowish, with a green 



