"^ 5, Spike ovcito; scales coriaceous; bristles G, rigid; nut 

 triangular ; tuherclc mitriform, nearly as large as the nut, 

 spongy; style 3-c/^/.— MiTROCARPAt 



12. Eleqcharis tuberculosa, R, Broum. 



Culm terete, filiform, striate j spike globose-ovate, some- 

 what acute; scales broadly ovate, very obtuse, loose, subco- 

 riaceous ; bristles rigid, retrorsely hispid ; nut oblong, obtusely 

 triangular, striate and pitted longitudinally ; tubercle ovate, 

 obtuse, subcompressed, nearly as large as the nut. 



Eleocharls tuberculosa, R. Broivn, proclr. 1. p. 224. {in ohs.) ; Rcem. 

 8f Schult. syst. 2. p. 152. 



Scirpus tuberculosus, Michx.! Jl. 1. p. 30; Vahl, enum. 2. p. 248; 

 Poir. enc. meih.6. p. 753; Purshjl. 1. p. 54 ; Beck! hot. p. 424; Qrayf 

 Gram. 8f Cyp. part 1. no. 79; Spreng. syst. 1. p. 203, 



S. tuberculatus, Elliott, sk. 1. p. 78. 



S. no. 7, Muhl. ! gram. p. 29, <^ Urh. ! 



Culm 8 — 12 inches higb, slender and wiry, pale green, clotlied at 

 the base with one or t-vv'o obliquely truncated sheaths. Spike 3 — 4 lines 

 long, 12 — 16-flowered. Scales pale green, or whitish, mixed with ligh^ 

 brown, of a firm cartilaginous textiire. Bjistles 6, strong, longer tliai^ 

 the nut, but not exceeding the tubercle, hispid downward. Stamens 3, 

 Style 3-cleft. Ntit large, and bulging out the scale, shining, marked 

 with longitudinal lines with intermediate rows of shallow indentations, 

 ^nd thus appearing somewhat reticulated. Tubercle shaped like a cap, 

 mpstly obtuse, of a soft spongy texture, whitish, free round the base, 



Hab. Wet places ; particularly in sandy swamps | seldonn 

 found far from tide-water ; Massachusetts to Florida, Tewks= 

 bury, Massachusetts, B. D. Greene, Esq.! also near Salem in 

 the same State, Dr. Fickering ! ; pine barrens of New Jersey, 

 abundant ! ; South Carolina, Michaux!, Elliott; East Florida, 

 Dr. Baldwin! ; West Florida, Mr, Ware!; New Orleans, 

 Dr. Ingalls ! — September. 



Obs. a species remarkable for its large thick tubercle, by 

 which it is easily distinguished from every other plant of the 

 tribe Scirpea). 



