44 TRIANDRIA. MONOGYNIA. scirpus. 



§. I. Seed surrounded with bristles at the base. 



f. Style articulated to the seed ; base dilated and fier- 

 sistent. Seed often lenticular. (Spike solitary.) 

 1—10, Eleocharis R. Br own. 



tt- Style filiform^ not bearded^ deciduous. 11 > 



17. Scirpus L. F.Brown. 



ftf. Style Jili/orm, deciduous. Bristles much longer than 

 the seed. 18 — 19. Trichophorum Pers. 



§. 2. Seed naked at the base. 



f . Style simfile at the base, not articulated to the seed^ 

 deciduous. 20 — 22. Isolepis R. Brown. 



tf. Style bulbous end comfiressed at the base, ciliate on 

 the margin. 23 — 24. Fimbri3Tylis VahL 



1. ^. lenuis Willd.: culm very slender, quadrangular ; 

 spike elliptical, acute at each end ; glumes ovate, obtuse ; 

 stamens 3 ; style 3-cleft ; seed rugose. Will d. Enum. hort. 

 J5ero/. 1. p. 76. Muhl,Grajn.p.21. R o eni' ^ S c hu i t. 

 U. p. 127. 



Root fibrous, perennial. Culm naked, 8 inches or a foot high, 

 acutely quadrangular, with the sides sulcate ; the lower part 

 with one or two purple truncate sheaths. S/iikc at first rather 

 obtuse ; the 2 or 3 lower glumes larger and empty. Glumes 

 very dark brov/n, with a whitish scarious margin. Seed round- 

 ish, obtusely triangular, brown, crowned with an orbicular tu- 

 bercle. Bristles 2 — 3, sometimes wanting. 



Hab. Swamps, and borders of ponds; generally in brackish 

 water. June — July. 



A very common plant, but not described by Purs h. It 

 was probably confounded by him with the S. r/uadrangularis 

 of Michaux, as it was' by Muhlenberg in his Cata- 

 logue. The real S. guadrangularis is a very different plant, 

 which probably only inhabits the Southern States. It is well 

 described by Elliot t^ and also by Muhlenberg, who 

 calls it S. marginatus, 



2. S. glaucus*: culm many-angled, glaucous ; spike ovate, 

 acute; glumes ovate, obtuse or emarginate. Stamens 3; 

 tstyle 2-cleft. Scirpus No. 7. (anonymos) M u h I. Gram. 



