64 TRIANDRIA. MONOGYKIA. cvierus- 



euperiformts Tor. Cat. pi. N. York, p. 14. M. umbellatu? 



P ur s h Fl. I. p. 59. excl. sjn. 



Root tuberous. Culm triquetrous, slender, 8 — 12 inches lons^, 

 nearly naked. Leaves mostly radical, linear, carinate, rough 

 on the margin. Involucrum 3 — 4-leaved, unequal ; leaves 

 longer than the umbel. Head of spikeleis simple and sessile, 

 or more commonly with 1 or 2 (rarely 3 — 5) lateral rays, 

 Rays V- — 3 inches long, spreading almost horizontally. Sfiike- 

 lets generally 7-flowered, at fiist nearly terete, but when old 

 compressed. Rachis triangular. Glumes rather remote, ovate ; 

 the lower ones obtuse, the others rather acute, brown and 

 green. Stamens 3. Style 3-cleft. Seed oblong, triangular, 

 gray. 

 Hab. On dry hills, and in barren stony soils. New-England to 

 Carolina. July — September. 



Much resembling a Mariscus in habit, but is still decidedly 

 a Cyperus. It appears to have very little affinity to Scirpus- 



1 3. C. odoratus L, : spikelets corynnbed, subulate, re- 

 mote, distichous; glumes somewhat distant; smaller umbels 

 spreading widely, and about the length of their involucra. 

 Fa hi Eirnm. II . p. 3o6 . W illd. Spec. 1 1 . p. 284 . Pursh 

 Fl. \. p. 52. Roem. <^ Schult. l\. p. 212. 



Hab. On the banks of rivers. Pennsylvania to Florida. Pursh. 

 This species I have never seen. It is not recorded as a na- 

 tive of North- America by any other botanist except Pursfu 

 who, I strongly suspect, has confounded it with some other 

 Cyperus described in this work. 



14. CJlavicomis Mich. : culm triquetrous ; timhel com- 

 pound ; spikes linear- lanceolate, 7-flowered (10 — 12-flowered 

 Ell.\) glumes obtuse; involucrum very long, reflected. 

 Mich. Fl. \. Tp.21. Vahl Emim.U. p' SGO. Pursh 

 F/. 1. p. 53. Elliott Sk.\. p. 71. M u k l. Gram. ^. 24, 

 Roem. ir Schult. II. p. 215. 



Culm erect, smooth. Involucrum 5-leaved, very long, smooth. 

 Rays of the umbel unequal; ochrex retuse, purple. Spikes 

 distichous, oblong, yellow, compressed, 11 -flowered. Glumes 

 obtuse, white and scarious on the margin. Style 2-cleft. Seed 

 obovate, puncticulate, black. Mu hi. 



Hab. In boggy woods. Pennsylvania to Carolina. Pursh. I 

 think it doubtful whether this species has been found as fa;- 

 north as Virginia. 



ERIOPHORUM. L. 



Glumes l-valved, imbricated on all sides into a spike. 

 Corolla 0. Seed surrounded with long dense wooL 

 Gen. pi. 95. Nutt. Gen. I. p. 2^6. Roem. &" 



