Monograph of North American Rhynchosijorde. 199 



ducous, ovate, carinate. Bristles 6, about one third longer than the 

 nut, (twice as long as the seed. Ell. setae nonnullte, Bcem. et Scliult.) 

 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. Ciirtis ; Georgia, Le 

 Co?ite; New Orleans, T. Drummond; Middle Florida, Dr. 

 Chapjnan. 



•Obs. This species is also a native of Puerto Rico, where it 

 was collected by Bertero ; fide Rcem. 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, transversira rugulosa, basi subattenuata, tubercu- 

 lum excedente, setis sursum hispidis subduplo breviore. 



R. caduca, Elliott, Bot. S. Car. ^ Georg. I. p. 62. Rmn. i^ 

 Schult. Ma?it. 11. 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 o. Style long, sii^tly 

 bifid. Nut a line in length, somewhat plano-convex, crowned with a 

 compi-essed-conic tubercle, nearly one-third its length. 



Hab. In wet soils, Charleston, S. Carolina, Elliott; Wil- 

 mington, North CaroUna, Mr. Curtis ; St. John's, Florida, 

 Dr. Baldwin. 



Obs. " This species is neai'ly allied to R. sparsa, (R. milia- 

 cea, nob.) from which it differs in having its spikelets larger, 



Vol. III. 26 



