North American Cyperace^e. 367 



Bristles 6, slender. Nut much compressed, as in K. gracilenta, but 

 smaller; the whole surface of the tubercle minutely hispid-scabrous 

 upward. Style 2-parted quite to the place where it separates in falling. 



Hab. North Carolina, Mr. Curtis! ; Middle Florida, Dr. 

 Chayman ! 



Obs. 'In the Monograph of N. American RhjjnchosporcSf 

 no. 26, this plant is referred to as having been sent to us by Mr. 

 Curtis. More perfect specimens recently received from Dr. 

 Chapman satisfactorily prove that this plant, although allied to 

 R.fusca and R. gracilenta, is distinct from either. The ca- 

 pillary leaves (like those of Scirjms cainllaj'is), and the rough- 

 ened tubercle, are characteristic of our plant. It is much more 

 delicate and smaller in all its parts than R.fusca, and the nut 

 is more flat, in which particular it nearly agrees with R. gra- 

 cilenta. The smaller spikelets, the form of the nut, and the 

 direction and degree of the hispidness of the bristles at once 

 distinguish this species from R. capillacea. 



19. R. GRACILENTA, Gray! monogr. I. c. p. 216. 

 K. fusca, Gray! Gram. Sf Cyp. part 1. no. 93. (excl. syn.) 



Mr. Drummond collected this species in Texas. 



20. R. DiSTANS, Nictt.gen.l. p. 93, (not of VakV/) ; 

 Gray! monogr. I. c. p. 216. 



Schoenus distans, Michx.! fl. 1. p. 36* 



A variety of this species with a single terminal fascicle, and 

 with bristles longer than the nut, occurs among the plants col- 

 lected in Texas by the late Mr. Drumm.ond. 



21. R. GLOMERATA, Vahl, enum. 2. p. 234; Gray! Grafn^ 

 ^Cyp. part 1. no. 94, and monogr. I. c. l.p. 217. 



R. capitellata, Vahl, I. c 



Schcsnus glomeratus, Linn. 



S. capitellatus, Michx. ! ft. \. p. 36. 



Vol. IIL 47 



