380 North American Cyijeracea. 



Subgenus TRICHOPHORUM. 



Bristles 6, much longer than the nut, capillary, tortuous, 

 smooth or merely pubescent, (not hispid). Style 3-cIeft, 

 simple at the base, deciduous. Nut compressed, triangular. 

 — Culm leafy ; umbel decompound ; scales of the spikes mem- 

 branaceous. 



Trichophorum, Rich, in Pers. syn. 1. p. 69 ; Nees ah Escnh. 

 in LinncEa, 9, p. 293 ; Leslib. ess. fam. Cyp. p. 42, no. 54 ; 

 Niiit.gen. 1. p. 36. 



Species of Scirpus, Vahly 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. hrunncus and S. diva- 

 ricatus, 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, Michx. 



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.! Ji. 1. p. 33; Torr.! fi. 1. p. 50; Big. ! Jl. 

 Bost. ed. p. 22 ; Darlingl. ! fi. Cesl. ed. 2. p. 23. 



S eriophorus, Vahl, enum. 2. p. 282 ; Reem. Sf SchuU. syst. 2. p. 

 147 ; SchuU. mant. 2. p. 83. 



S. thyrsiflorus, Willd. enum. hort. Berol. 1. p. 78. 



Trichophorum cyperinum, Pers. syn. 1. p. 69 ; Spreng. syst. 1. p. 

 214; Pursh,fl. 1. p. 57; Muhl.! gram. p. 47 ; Elliott, sk. 1. p. 91. t. 3. 

 f. 4 ; Beck, lot. p. 426. 



Eriophorum cyperinum, Linn. sp. p. 77; Willd. sp. 313. 



Scirpus paniculatus, foliis floralibus paniculam superantibus, Gron. 

 ft. Virg. p. 12. 



