TRI ANDRI A— MONOGYNI A. Scirpus. 6 L 



Juncus acutus maritimus, caule triquetro maximo molli, et proce- 

 rior nostras. Pluk. Almag. 200. Phyt. t. 40. /. 2. Rail Syn. 428. 



/3. Scirpus pungens. Vahl Enum. v. 2. 255. 



Juncus acutus maritimus, caule triquetro, rigido, mucrone pungente. 

 Pluk. Almag. 200. Phyt. t. 40. /. 1. Dill, in Rail Syn. 429. 



J. acutus maritimus, caule triangulo. Bauh. Theatr. 17 5. f. Moris. 

 v. 3. 232. sect. 8. t. 10./. 20. Rel. Rudb. 22. /. 2, 3. 



About the muddy banks of rivers exposed to the tide, but rarely. 

 In the Thames at Lambeth, Battersea, &c. as well as below 

 London. Doody. (5. Found by Sherard in Jersey. 



Perennial. August. 



Root creeping, forming large entangled tufts. Stems 3 feet high, 

 acutely triangular throughout, pliant and cellular, with many 

 transverse interruptions ; the point erect and rather sharp. Leaf 

 solitary, very short, with a long close sheath. Spikes from a 

 lateral cleft, 2 or 3 inches below the top, partly sessile, partly 

 on rigid angular stalks ; all ovate, of numerous, closely imbri- 

 cated, elliptical, concave, fringed, keeled, pointed, partly reddish, 

 glumes. Stam. 3, with 3 rough intermediate bristles. Stigm. 2, 

 downy. Seed roundish, obtuse, smooth and polished, in which, 

 as Schrader observes, it differs from the exotic S. mucronatus, 

 whose seed is minutely corrugated, with 5 or 6 rough bristles 

 beneath. Our 5. triqueter has 3 or 4, scarcely more. |3, as far 

 as I can discover, is but a variety, whose spikes are all sessile. 

 Yet Plukenet's figure more resembles a Carolina species, S. 

 americanus of Pursh, n. 16 ; and Commerson's specimen before 

 me, alluded to by Vahl, is like mucronatus, but has smooth seeds. 



11. S. carinatus. Blunt-edged Club-rush. 



Stem bluntly triangular upwards, naked ; round at the base. 



Panicle cymose, terminal. Bractea pungent, channelled, 



erect. Stigmas two. 

 S. carinatus. Comp. 10. Engl. Bot. i>.28. 1. 1983. Hook. Lond. t. 79. 

 S. lacustris y. Huds. 1 9. Fl. Br. 52. 



Juncus aquaticus medius, caule carinato. Dill, in Rail Syn. 428. 

 Doody's Furrowed Bull-rush. Pet. Cone. Gram. n. 199. 



About the banks of large rivers. 



In the Thames at Battersea and Limehouse. Doody. Above 

 Westminster bridge. Mr. E. Forster. On the banks of the Arun, 

 near Arundel castle. Mr. Borrer. 



Perennial. August. 



Root creeping. Leaf none. Stem rather convex between the 

 angles ; not flat, or concave, as in S. triqueter. Panicle most 

 like S. lacustris, but the principal bractea is often longer, and 

 more of the texture of the stem ; still evincing its true nature, 

 as I apprehend, by being channelled ; though with regard to 

 terminal or lateral inflorescence, the present species is inter- 



