218 Monog7-aj)h of North American RhijnchosponE. 



pitata, tuberculum subulatum sequante ; setis retrorsum his- 



pidis, nucem diiplo longiori. 

 R. glomerata, Vahl, Emm. II. p. 234. Pursh, Fl. I. p. 48. 

 ' B/em. ^ Schult. Sys. Veg. II. p. 86. Elliott, Bat. S. Car. 



^ Georg. I. p. 61. Torrey, Fl. I. p. 55. 

 R. capitellata, Vahl. Emim. II. p. 235. Rcem. ct Schult. Syst. 



Veg. II. p. 87. Elliott, Bot. S. Car. Sf Georg. I. p. 61. 

 Schoenus glomeratus, Linn. Sjy. PI. 65. Willd. Sp. PI. I. p 



236. MuhU Gram. p. 8. Walt. Fl. Car. p. 69. 

 S. capitellatus, Michx. FL 1. p. 36. 

 S. capitatus, Pers. Syn. I. p. 60. Muhl. Gram. p. 10 f 



Culm 1 — 2 feet high, triangular. Leaves narrow-linear, carinate, smooth, 

 scabrous on the margin, shorter than the culm. Flowers in corymbose 

 or capitate fascicles, on included or somewhat exserted peduncles, la- 

 teral and terminal, often 2 or more from the same sheath ; the lower 

 ones distant. Spikelets o^^ate-oblong or lanceolate. Glumes brownish, 

 lanceolate, mucronate. Bristles 6, retrorsely hispid, twice as long as 

 the nut. Stamens 3. Nut smooth, obovate, lenticular, attenuate at 

 the base. Tubercle subulate, compressed, equalling the nut. 



Hab. In bogs and moist places ; Canada to Florida. Flowers 

 from July to September. 



30. Rhynchospora cephalantha. 



R. capitulis axillaribus terminalibusque, subglobosis, multifloris, 

 interdum geminatis ; spiculis oblongo-lanceolatis ; nuce laevi, 

 orbiculato-obovata, lenticulari, subraarginata, basi attenuata, 

 tuberculum subulatum sequante ; setis sursum vel retrorsum 

 hispidis, nuce duplo longiori. 



Culm thick, triangular, 2 — 3 feet high. Leaves narrow-linear, flat, sub- 

 carinate ; lower ones elongated ; the upper ones much shorter. Capi- 

 tuli 2 — 7, large, subglobose, remote, on included or slightly exserted 

 peduncles, often two or more from the same sheath. Spikelets oblong- 

 lanceolate. Glumes fuscous, ovate-oblong, acute. Bristles 6, about 

 twice the length of the nut, hispid upward or downward. Stamens 3. 

 Style bifid. Nut larger than in R. glomerata; when mature appear- 



