Monograph of North American Rhynchospora. 199 
ducous, ovate, carinate. Bristles 6, about one third longer than the 
nut, (twice as long as the seed, Ell. setae nonnullce, Ecpjii. cL Schult.) 
somewhat caducous, hispid upward. Style bifid. Nut about half a 
line in length, tumidly obovate or ovate, crowned with a depressed- 
conic tubercle, scarcely one-fourth its length. 
Hab. " Wet soils, in pine barrens generally," Elliott ; New 
Bern, North Carolina, Mr. Moses A. Curtis ; Georgia, Le 
Co7ite; New Orleans, T. Drummond; Middle Florida. Dr. 
Chapman. 
Obs. This species is also a native of Piierto Rico, where it 
was collected by Bertero ; fide Roem. et Schult. Mant. I. c. 
I have adopted the specific name of Lamarck on account of 
its priority. 
5. Rhynchospora caduca, Ell. 
R. culmo triquetro; paniculis axillaribus terminalibusque, erec- 
tis ; spiculis ovatis ; nuce orbiculato-ovata, paululum plano- 
convexa, transversim rugulosa, basi subattenuata, tubercu- 
lum excedente, setis sursum hispidis subduplo breviore. 
R. caduca, Elliott, Bot. S. Car. 6f Georg. I. p. 62. Rcem. ^ 
Schult. Mant. II. p. 51. Spreng. Syst. Veg. I. p. 196. 
Culm acutely triangular, 1 — 2 feet high. Leaves broad-linear, 2 — .3 
lines wide, glabrous. Panicles corymbose with the flowers some- 
what crowded, on peduncles twice as long as the sheaths. Spikelets 
ovate, acute, nearly twice as large as in R. cymosa, pedicellate or ses- 
sile. Glumes caducous ; exterior bones broad-ovate, carinate, with a 
short mucro ; the interior ones longest, acute. Bristles 6, twice the 
length of the nut, hispid upward. Stamens 3. Style long, slightly 
bifid. Nut a line in length, somewhat plano-convex, crowned with a 
compressed-conic tubercle, nearly one-third its length. 
Hab. In wet soils, Charleston, S. Carolina, Elliott; Wil- 
mington, North Carolina, Mr. Curtis ; St. John's, Florida, 
Dr. Baldwin. 
Obs. " This species is nearly allied to R. sparsa, (R. milia- 
cea, nob.) frorr. v/hich it diitbrs in having its spikelets larger, 
Vol. III. 26 
