206 Mun.o!j;raph of North American Rhynchospora. 



Schoenus corniculatus, Lam'k. III. Gen. I. p. 137. 



S. longirostris, Michx. Fl. I. p. 87. MiM. ! Gram. p. 7. 



S. umbellatus, Walt. Fl. Car. p. 70. ? 



Rhynchospora laxa, Valil Emm. 11. p. 231. Pursh. Fl. I. 



p. 48. Rosmer (5)^ Schnltes, Syst. Veg. II. p. 84. Torrey, ! 



Fl. I. p. 57. Sprcngel, Syst. Veg. I. p. 196. 

 R. longirostis, Elliott, Bot. S. Car. Sf Georg. I. p. 59. 



Whole plant sraoolh and somewhat glaucous. Culm triquetrous, 3 — 6 

 feet high. Leaves a foot or more in length, J — \ an inch wide, 

 smooth, scabrous on the margin. Flowers axillary and terminal, in 

 decompound, subumhellate corymbs : the terminal one largest. Spi- 

 kelets subulated by the persistent exserted styles; when mature 

 nearly an inch in length, loosely fascicled in fours and fives at the 

 extremity of the elongated triquetrous peduncles. Glumes ovate, 

 fuscous. Bristles for the most part 6, subulate, minutely scabrous 

 upward ; the three outer ones (one of which is frequently wanting) 

 about i the length of the nut ; one of the inner series about i, and the 

 two others i the length of the nut. Stamens 3. .S^j/Ze undivided. Nut 

 smooth, obovate, compressed, crowned with the scabrous (upward), 

 persistent, indurated style, about twice and a half its length. 



Hab. In wet places, Ohio to Florida ; common ; Dela- 

 ware, Muhlenberg, {Cat. PL Am. Sept.) 



Obs. I have restored the specific name of Lamarck on ac- 

 count of its priority. 



14. Rhynchospora macrOvStachya, Torrcy, Herb. 



R. corymbis axillaribus simplicibus, terminalibus compositis ; 

 spiculis magnis, confertim fasciculatis ; mice obovata, lasvi, 

 setis sursum hispidulis dulpo — stylo persistente subquadru- 

 plo — breviore. 



Culm 2 — 3 feet high, smooth, triangular. Leaves glabrous, 1 — 2 feet 

 long and 2 — 4 lines broad ; the upper ones scabrous on the margin. 

 Corymbs about 4, densely fasciculated ; the lateral ones subsimple, 

 on peduncles twice the length of the sheaths; the terminal one 

 largest, compound, subsessile, leafy ; the fascicles sessile and pedun- 



