TRIAXDRIA MONOGYNIA. 85 



Root foniiins; a thick, compact tuft- Stems crowded, 2 — 3 feet high, 

 nearly round at base. Leaves 12 — 18 inches high, 1 line in diameter, 

 concave on the interior surface, margins a little rough, sheathing the 

 base of the stem in two rows ; sheatns dilated; throat of the sheath 

 without hair. Umbel ^s in the succeeding species. Leaves of the 

 involucriim subulate^ one twice as long as the umbel, scarcely rough- 

 ened along their margins. Glumes nearly round, rigid, glabrous. 



Sijfh fimbriate, 2 cleft, deciduous. 



Grows along the margins of salt water, l^his has generally been 

 confounded with*the succeeding species; it dilfers essentially* in its 

 leaves, and grows in dense bunches, like the Juncus effusus. It forms 

 A great part of our salt rushes, and is-probably confined to the neigh- 

 bourhood of the ocean* 



Flowerfc through the summer. Salt-water Ruslu 



^ 



The figure in Sloan, (vol. 1. tab. 76. f. 2*) represents this species 

 remarkable well ; the spikes are not in this figure, nor have they ever 

 appeared to me, terete as described by VahU 



S3. pERRrGINEUS, 



S. culmo compresso, j Stem compressed, an- 

 angiilis superne scabris ; I gles near the summit 

 foliis concav is ; im olucro I scabrous ; leaves concave, 

 insecpmlitcr ciliato ; spi- j those of tlie involucrum 



i rotundato-lanceolatls. | unequally ciliate ; spikes 



E 



Sp. pi. 1. p. 304. S. pubenilus, Mich. 1. p. 31. 



]y round 



Fimbiistylis puberulum, Vahl. Enum. pi. 2. p. 289. Pursh, I. p. 49, 



Stem almost solitary, firralj erect, 1—3 feet high, somewhat com- 

 pressed J angles near the summit irregularly rou^ljenerl. Leaves 

 erect, 1 foot long, S lines wide, coriaceous, concave, with the margin 

 cartilagiuoMs, serrulate ; throat of the sheath furnished wih a short 

 fnn2;c •, the leaves sheath each other as if two rowed (distichous). 

 Imhels compound, 3 — 7 spikes on each branch, one comraoolv §es- 

 sile m the division of the branches. Involucrum like the leaves, the 

 margins irregularly and sharply ciliate ; one leaf longer than the urn- 

 oel, the partial involucrums shorter t!ian the small umbel. Glumes 

 nearly round, coriaceous, rigid, with a short point, pubescent and 

 mnged, uniformly ferruginous. Stiile £ cleft, fimbriate, deciduous. 

 ott^mas plumose, white. Seed obovate, compressed, acute at each 



In this species many of the lower glumes are sterile, 

 brows along the margins of salt water, but is not confined to such 

 sons. Louisville, Georgia. Mr. Jackson, 

 riowcrs through the summer. Downy-jlowered Scirpus; 



.4. 



