TRIANDRIA— DIGYNIA. Glyceria. 117 



2. G. fluitans. Floating Sweet-grass. 



Panicle oblong, branched, divaricating. Spikelets close- 

 pressed. Florets numerous, obtuse, seven-ribbed, with 

 short intermediate ribs at the base. Nectary obtuse, tu- 

 mid. 



G. fluitans. Br. Pr. 179. 



Festuca fluitans. Linn. Sp. PI. 11 1 . Willd. v. 1 . 426. Huds. 46. 



Curt. Lond.fasc. 1. t.7. Mart. Rust. t. 1 13. Ft. Dan. t. 237. 



Host Gram. v. 2. 55. t. 77. Schreb. Gram. v. 1 . 37. t. 3. Leers 



35. t.S.f.b. 

 Poa fluitans. Scop. Cam. ed. 2. v. I. 73. Fl. Br. 96. Engl Bot. 



v. 22. t. 1520. Knapp t. 45. Salisb. Pr. 21. Hook. Scot. 32. 



Schrad. Germ. v. 1 . 280. 

 P. n. 1453. Hall. Hist. v. 2. 219. 

 Gramen aquaticum, cum longissima panicula. Bauh. Hist. v. 2. 



490./. RaiiSyn. 4\2. 

 G. aquatieum fluitans, multiplici spica. Bauh. Thealr. 41. /. 



Scheuchz. Agr. 199. t.4.f.b. 

 G. fluviatile. Ger. Em. 14./. 

 G. loliaceum fluviatile, spica longissima divisa. Moris, v. 3. 183. 



sect.S. t.3.f. 16. 

 G. mannse esculentum prutenicum. Loes. Pruss. 108. f. 21, bad. 



In stagnant waters, and slow streams, frequent. 



Perennial. June — August. 



Root long and creeping, or partly floating. Stems ascending, round, 

 striated, leafy, smooth, hollow, tender, partly decumbent on the 

 surface of the water, as are many of the long, linear, obtuse, flat, 

 smooth leaves. Sheaths long, compressed, very smooth. Stipula 

 pointed, often torn, decurrent. Panicle nearly erect, long and 

 narrow, doubly but sparingly branched, the branches roughish, 

 rather turned to one side, for the most part erect, but while 

 flowering strongly divaricated for a time. Spikelets erect, long, 

 linear, nearly cylindrical, of 8 — 12, rather lax, florets. Cal. mem- 

 branous, obtuse, with a green keel, but no lateral ribs : one 

 valve much the largest. Outer valve of the cor. cylindrical, ob- 

 tuse j membranous, and often notched, at the summit -, mi- 

 nutely downy under a high magnifier, furnished with no promi- 

 nent keel, but with 7 equal, parallel, roughish ribs, besides a 

 short intermediate one, on each side of the central rib, at the 

 bottom ; inner valve flat, inflexed at the edges, with a marginal 

 rib, as in most of the true grasses, the summit cloven. Nect. 

 thick and glandular, scarcely lobed. Anth. much contracted 

 after flowering. Germ, elliptical. Styles distinct. Stigmas 

 large and bushy, being, as Curtis and Brown remark, repeat- 

 edly compound. Seed elliptic oblong, with a deep furrow at 

 one side. 



Loestl describes the mode of collecting the seeds for food, of which 



