50 TRIANDRIA. MONOGYNIA. scirpus. 



Coo ley and Hitchcock. In Pennsylvania. Muhleri' 

 b e rg. August — September. 



17. S. macrostnchyos Muhl.: culm triquetrous, leafy; 

 corymb clustered ; involucrum about 3-leaved, very long ; 

 spikes oblong ; glumes ovate, 3-cleft, the middle segment 

 subulate and reflected; style 3-cleft. Muhl. Gram, p. 45. 

 S. robustus Pursh Fl. I. p. 56. R o em, ir S chul t. II. 

 p. 140. S. maritimus /?. macroslachyos Mich. Fl. 1. p. 32, 

 S» maritimus Big, Bost.Tp. 15. Elliott Sk, I. p. 86. 



Culm acutely 3-angled, 3 — 4 feet high. Leaves smooth, cari- 

 nate, taller than the culm. Involucrum resembling the leaves. 

 Sfiikes in a kind of conglomerate corymb, 6 — 10 in number, 

 nearly an inch long. Glumes brown, lacerately 3-cleft, pu- 

 bescent. Stamens 3, Seed compressed-triangular, pointed 

 with the remains of the style. Bristles 4, about as long as the 

 seed. 



Hab. In salt-marshes, and in ditches near salt-water. July — 

 August. 



Nearly allied to S. mariiimusy but differs in the form and size 

 of the spikes, Sec. 



^ * ¥ 



1 8. S. Eriophorum M i c h. : culm obtusely triangular, 

 leafy; panicle decompound, proliferous, nodding; spikes all 

 pedunculate; bristles surrounding the seed exserted. Mich. 

 Fl, I. p. 33. S. eriophorus Va h I Enum. II. p. 282. Roem. 

 <S^ Schult. II. p. 147. Eriophorum c^joenViMm L, Sp.pl. 

 77. Willd. Spec,\,^p.3\3. B ig» Bost, ^, ]6, Walt, 

 Car. p. 71, Trichophorum cyperinum P e r s. Syn, I. p. 69. 

 Pursh FL I. p. 57. Muhl. Gram. p. 47. Elliott 

 Sk. 1. p. 91. t. 3. f. 4. SciRP. thyrsijiorus Willd. Enum. 

 hort. Berol. 1. p. 78. S, paniculatus, &ic, Gron, Virg, 

 p. 12. 



Root perennial. Culm 4 — 5 feet high, very smooth. Leaves a 

 foot or two feet long, linear, scabrous on the margin ; sheaths 

 very long, margin brown. Involucrum of 4 long leaves re- 

 sembling those on the culm, with several intermediate shorter 

 ones. Panicle terminal, much divided and proliferous, partly 

 nodding ; branches sheathed at the base. Sfiikes all peduncu- 

 late, forming small umbels at the extremities of the branches, 

 obtuse. Glumes ovate, obtuse, brown when old. Stamens 3. 

 Style 3-cleft. Seed white, ovate, compressed. Bristles 6, 

 crisped, brownish, projecting much beyond the glumes when 

 the seeds are ripe, giving the spikes a woolly appearance. 



Hab. Borders of swamps and in wet meadows; common 

 August. 



