ERioPHORUM. TRIANDRIA. MONOGYNFA. 65 



Schult. Gen. 180. Lam. III. t. XXXIX. Nat 

 Ord. Cyperoide^ Ju s s. Cotton-grass. 



t Sjiike solitary. 



1. E. alpinum L, : culm triquetrous, somewhat scabrous, 

 naked ; leaves very short, subulate ; spike oblong ; woolly 

 hairs crisped, few. JV il I d. Spec. \. p. 312. Vahl Emim, 

 11. p. 388. Wahl. Fl. Lapp. p. \Q. Eng. But. t. 311. 

 R em, (^ Schult. I. p. ! 5G. E. hudsoidanxim M i a h. 

 Fl. 1. p. 34. Trichophorum alpinum Pur sh Fl. I. p. 57. 

 M u h I. Cat. p. 7. T. alpinum /3, hudsoniamwi P e r s. Sun, 

 I. p. 70. 



Culm 8 — 10 inches high, slender, with very acute angles; sides 

 concave and striate. Leaves about half an inch long, pungent, 

 triangular, channelled above. Sheaths 3 — 4, radical, purplish; 

 the lowest ones mucronate with the rudiments of leaves. Spike 

 about 2 lines long, a little compressed. Glumes oblong-lance- 

 olate, obtuse, carinate, pale yellowish-brown ; the exterior 



bracteiform, 3-nerved, somewhat mucronate. Stamens 



(1 — 2 in the European plant.) Siyle S-cleft. Seed ovate, 

 acuminate, much compressed, with an elevated ridge on one 

 side, brown. Hairs 6, white, 3 limes as long as the spike, 

 flattened, more or less crisped. 



Hab. In bog-meadows. Stockbridge, Massachusetts. Dr. Em- 

 m on s. In bogs on the rnountains of Pcmsyivania, Vermont, 

 Sec. Pursh. In New-York. Muhlenberg. 



I have carefully examined the specimens sent to me by Dr. 

 Emmons, and com.pared them witii those in my herbarium, 

 from N'jrway and Germany, and find thern to agree in almost 

 every respect. 



2. 1^. vaginatum L.: culm terete below, obtusely trian- 

 gular above, stnooth and ri^id; sheaths inflated; spike oblong- 

 ovate ; glumes scarious ; wool straight, dense. Will d. Spec, 

 1. p. 312. Fa hi Enurn. 11, p. 388. Wahl. Fl. Lapp, 

 p. 17. Eng. Bot. t. S7:i. R o e m. (^ S c h u 1 1. U. p. 157. 

 E. cespitosum Pursh Fl. I. p. 57. Host Gram. J. t, 39, 



JRoot creeping ? Culnis densely ctspitose, about a foot high. 

 Leaves mostly radical, longer than i!ie culm, acutely triangu- 

 lar and almost setaceous, scabrous t twards the upper extre- 

 mity. Sheaths on tlie culm, about 2, ventiicose, i.iucronate; 

 the radical ones lacerate irito slender filaments. Spike about 

 3-fourths of an inch long. Ghimes of a livid colour, membia- 

 naceous, ovate-lanceolate, acuminate ; the exterior ones empty, 



and at length reflected. Stamens . Sty^e 3-cieft, Seed 



obovate, much compressed, very obtuse. JVool white, about 

 twice the length of the glumes; hairs about 20 to each seed, 

 flattened. 



9 



