80 . TlilANDRiA MONOGYNIA. 



1 



Moot perennial, cespitose. Stem 12 — 18 inches Ixigb, obtusely 3 

 angled, glabrous, with 1 — 3 sheaths, loose at base, and slightly inu- 

 cronate. Involucrum 2 — 3 inches long, erect- Spikes generally 3, 

 ovate. Glumes ovate, membranons, somewhat inflated, mucronate. 

 Seed obovate, flattened on one side, transversely striate, pointed with 

 tlie persistent style. Bristles 6 ? longer than the seed. 



Grows in the upper country. Brought from Greenville by Mr, 



3Vfoulins. 



JFIowers September. Weak-stalked Scirpus. 



*! .»' 



12. Americanus. Persoon 



S. culmo tviqueti'o, la- 

 teribiis concavis; spicis 

 ovatis, lateralibus, sessili- 



Stem 3 angled, sides 

 concave ; spikes ovate, 

 lateral, sessile ; seed acu- 



bus ; semine acuminato. j minate 

 E 



Pursh, 1. p. 55. S.triqueter, Mich. 1. p. 50. . 

 ». mucronatus, Walt. p. 70. . 



Soot thick, creeping. Stem £—3 feet hi^h, glabrous, the sides con- 

 cave, margins entire. Sheaths 1—3, 2-3 inches lonff, acute, keeled, 

 sheathing the base of the stem. Sjnkes ovate, G— 8 clustered on each 

 stem, (jrtumes ovate, ferruginous, with the margins scarious. Sed 

 oDovate, flat on one side, convex on tiie other, with the apex acumi- 

 nate, not tubercled. Bristles 6, glandular, hairy, longer than the 



This appears to be an intermediate species between S.triquetcranJ 

 mucronatus. It differs from the former, by its concave sides and 

 spikes. '^^ ' from the latter, by its erect stem and small number of 



Grows in damp soils. Terycommoii. 

 * lowers througlj tlie summer. 



43. Mucronatus. 



S. aphyllus, spicis ob- I Without leaves; spiKe« 

 longis, squamis integer- oblong, scales entire, acu- 

 nmis, mucronato-acumi. minate ; stem 3 angled, 

 natis; culmo triquetro 

 Vahl Enum. 2. p. 236. 



Sp.pl. I. p. 303. Pursh, 1. p. 55. 



flowt:,:J^l *be:t'?ltV:SJT-''*'^ summit much longer than the 

 ^ Grows in swamps and salt marshes, from Canada to Carolina- 

 Howers August 



