North American Cyperacea. 291 



f5. Nut on a very short stipe ; bristles as long as the claws of 

 the petals, somewhat denticulate ; petals cordate, with a short 

 acuminated point. 



Culm 2 feet high, slender; sheaths very hairy. Umbels composed of 

 5 — 9 spikes. Aivns of the scales nearly straight. 



Hab. Southern States, Delile! 



y. Nut twice the length of its stipe ; petals ovate, cuspi- 

 date, and terminating in a short bristle ; the claw shorter than 

 the retrorsely scabrous bristle ; leaves and sheaths hairy. 



F. squarrosa, Gray! Cham. Sf Cyjp. part 1. 78; Beclc hot. p. 129. 



Culm 12 — 18 inches high, slender. Leaves and sheaths hispidly hairy. 

 Spikes mostly terminal, 6 — 12 in an irregular umbel or cluster. Petals 

 rounded at the base, the summit attenuated into a long slender point or 

 short bristle. 



Hab. Bogs and swamps. New Jersey, particularly in the 

 pine barren region, and along the sea coast! — September. 



S, {pumila.) Nut somewhat obovate, gradually attenuated at 

 the base ; petals ovate-lanceolate, narrow at each end ; bristles 

 longer than the nut, retrorsely scabrous ; spikes 2 — 6, mostly 

 terminal, sessile ; leaves smoothish. 



F- squarrosa, (3. pumila, Torr.! Jl, 1. p. 6S. 



F. pumila, Spreng. syst. 1. p. 237; Schult. mani. 3. p. 546. 



F. Torreyana, Benk ! hot. p. 429. 



Culm 3 — 6 inches high, pubescent above ; lower sheaths pubescent ; 

 throat hairy. Involucre longer than the spikes ; 1 — 2 leaved. Spikes 

 ovate, thick. Scales ovate, obtuse, hairy, terminated by a recurved 

 awn nearly the length of the lamina. Bristles straight, very scabrous. 

 Petals much attenuated at the base, obscurely 3-nerved,the summit 

 tapering into a long cusp, or short bristle. Nut broadest near the top 

 abruptly acuminated. 



Hab. Sandy wet places. Near Babylon, Long Island, 

 and in the pine barrens of New Jersey ! ; Tewksbury pond, 

 near Boston, B. D. Greene, Esq. ! — August — September. 



e. (aristulata.) Nut on a short stipe, dilated in the middle ; 



