334 North American Cyjjcracea. 



dilatatus. Semen rubrotundum, transversim rugulosum. Setaj 0. — In 

 Virginia et Carolina." — Vahl, 1. c. 



Obs. In consequence of the absence of bristles in this species, 

 Roemer and Schultes have placed it it the genus Isolepis. It has not 

 been recognized by any American botanist, and I suspect it will prove 

 to be a species of Rbynchospora. 



11. ERIOPHORUM, Linn. 



Scales of the spike imbricated on all sides, mostly mem- 

 branaceous, numerous. Bristles (hairs) of the perigynium 

 numerous, (rarely as few as six,) capillary, flat, very long, col- 

 lected in fascicles at the base of the nut and forming a silky or 

 woolly tuft. Stamens 3. Style 3-cleft, simple at the base, 

 deciduous. — Culm generally leafy; spikes rarely solitary, 

 growing at the summit of the culm, mostly in a more or less* 

 compound umbel or cyme ; when mature, clothed with the long 

 silky bristles. 



Eriophorum, Linn. gen. p. 30 ; Juss.gen. p. 27 ; Lam. ill. 

 t. 39 ; Roem. Sf Schult. gen. ISO; Lestib. ess.fam. Cyjp. p. 42, 

 no. 55; Nees ah Esenh. in Wight's contrib. p. 110, and in 

 Linficea, 9. p. 293 ; Nutt. gen. 1. p. 36. 



§. 1. Spike solitary. 

 1. Eriophorum alpinum, Linn. 



Culm acutely triangular, filiform, somewhat scabrous, with 

 short subulate leaves at the base ; scales somewhat coriaceous, 

 keeled ; spike oblong ; hairs 6, crisped. 



E. alpinum, Linn.; Willd. sp. 1. p. 314; Vahl, enum. 2. p. 3S8; 

 Wahl. ji. Lapp. p. 16; Smith, Eng.fi. 1. p. 67; Eng. hot. t. 311 ; 

 Ram. SfSchult. syst. 2. p. 156; Spreng. syst. 1. p. 214 : Torr. ! fi. 1. 

 p. 65 ; Big.lfi. Bost. ed. 2. p. 23; Beck, hot. p. 427; Gray I Gram. 4- 

 Cyp. part 1, no. 87. 



E. Hudsonianum, Michx. ! fi. 1. p. 34. 



Trichophorum alpinum, Pursh, fi. I. \>' 57; Muhl cat. p. 7; Link, 

 enum, alt. p. 47, (fide Schult.). 



