336 NortJi American Cijj)crace<T. 
SuBGEXus TRICHOPHORUM. 
Bristles 6, much longer than the nut, capillary, tortuous^ 
smooth or merely pubescent, (not hispid). Style 3-cleft, 
simple at the base, deciduous. Nut compressed, triangular, 
— Culm leafy ; umbel decompound ; scales ol" the spikes mem- 
branaceous. 
Trichophorum, Rich. 171 Pcrs. syn. 1. p. 69 ; Nees ah Esenh, 
in Linncea, 9, p. 293 ; Lfs/ili. ess. Jam. Ci/jy. p. 42, no. 54 ; 
Nutt. gen. 1. p. 36. 
Species of Scirpus, VahJ, Michx, &c. » 
The genus Trichophorum of Richard differs from Scirpus 
only in its longer capillary bristles, which in the mature 
spikes project beyond the scales. In S. hrunneiis and S. diva- 
ricates, the bristles are long, rather pubescent than scabrous, 
slender, but shorter than the scales; so that they connect Scir- 
pus with Trichophorum, and show that the latter can at the 
most rank only as a subgenus. 
14. Scirpus (Trichophorum) Eriophorum, Miclix. 
Culm obtusely triangular; umbel terminal, much decom- 
pounded; involucre many-leaved, very long; spikes ovate; 
scales lanceolate, appressed; bristles much exserted and in- 
vesting the mature spike ; nut smooth. 
S. Eriophorum, Michx.! Jl. 1. p. 33; Torr.f fl. 1. p. 50; Big. ! fl. 
Bost. ed. p. 22 ; DarlingU ! fl. Ccst. ed. 2. p. 23. 
S eriophorus, Vahl, emtm. 2. p. 2S2 ; licem. c^ Schult. si/st. 2. p. 
147 ; Schult. mant. 2. p. 83. 
S. tliyrsiflorus, Willd. cnum. hort. Berol. 1. p. 7S. 
Trichophorum cyperinum, Pers. syn. 1. p. 69 ; Spreng. syst. 1. p. 
214; Pursh,Jl. 1. p. 57; Muhl.! gram. p. 47 ; Elliott, sk. 1. p. 91. t. 3. 
f. 4; Beck, hot.]). 426. 
Eriophorum cyperinum, Lin?}, sp. p. 77; Willd. sp. 313. 
Scirpus paniculatus, foliis floralibus paniculam superantibus, Gron. 
fl. Virg. p. 12. 
