206 Monograph of North American Rhynchospora. 
Schoenus corniculatus, Lam''k. III. Gen. I. p. 137. 
S. longirostris, Michx. Fl. I. p. 87. Muhl. ! Gram. p. 7. 
S. umbellatus, Walt. Fl. Car. p. 70. .? 
Rhynchospora laxa, Vahl Enum. 11. p. 231. P^irsh. Fl. I. 
p. 48. Rcemcr ^ Schultes, Syst. Veg. II. p. 84. Torrey, ! 
Fl. I. p. 57. Sprengel, Syst. Veg. I. p. 196. 
R. longirostis, Elliott, Bot. S. Car. Sf Georg. I. p. 59. 
Whole plant smooth and somewhat glaucous. Culm triquetrous, 3 — 6 
feet high. Leaves a foot or more in length, I — J an inch wide, 
smooth, scabrous on the majgin. Flowers axillary and terminal, in 
decompound, subumbellate corymbs ; the terminal one largest. Sj)i- 
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. Style 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. PI. Am. Sept.) 
Obs. I have restored the specific name of Lamarck on ac- 
count of its priority. 
14. Rhynchospora macrostachya, Torrey, Herb. 
R. corymbis axillaribus simplicibus, terminalibus compositis ; 
spiculis magnis, confertim fasciculatis ; nuce obovata, IfEvi, 
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, subsessUe, leafy ; the fascicles sessile and pedun- 
