116 TRIANDRIA— DIGYNIA. Glyceria. 



perhaps in other indisputable species of that genus, whose 

 characters will be given hereafter. As to the present tribe, 

 the writer of this has long been convinced of their natu- 

 ral relationship to each other, and their ill agreement with 

 Poa^ and proposes the above characters, founded on the 

 shape of i\\eJlorets more especially, as no less obvious than 

 invariable. 



1 . G. aquatica. Reedy Sweet-grass. 



Panicle erect, repeatedly branched, spreading. Florets nu- 

 merous, obtuse, with seven ribs. Nectary cloven, acute. 



Poa aquatica. Linn. Sp. PL 9S. mild. v. I. 385. Fl.Br.Qo. Engl. 

 Bot. V. 19. t. 1315. Curt. Lond. fasc. 5. t. 12. Knapp t.44. 

 Hook. Scot. 32. Schrad. Germ. v. 1. 278. Host Gram. v. 2. 44. 

 t. 60. Fl. Don. t. 920. Leers 26. t.D.f.5 



P. n. 1454. Hall. Hist. v. 2. 220. 



Gramen aquaticum majus. Raii Syn. 411. Ger. Em. 6.f. Lob. Ic. 

 v.\.4.f. 



G. palustre paniculatum altissimiim. Bauh. Theatr. 38. Scheuchz, 

 Agr.\9l.t.4.f.\. 



G. paniculatum aquaticum latifolium. Moris, i?. 3. 201 . sect, 8. t. 6, 

 /.25. 



In ditches, pools, and the margins of running streams, common. 



Perennial. July. 



Root creeping, jointed, with whorled fibres. Stems 5 or 6 feet high, 

 smooth, a little compressed. Leaves broad, flat, single-ribt^d, 

 linear, with a short point, rough at the edges and keel only. 

 Panicle large, repeatedly compound ; its branches alternately 

 half whorled, angular, rough. Spikelets erect, more linear than 

 in Engl. Bot., of from 5 to 1 0, or more, florets, whose outer 

 valve is blunt and strongly ribbed, cylindrical, not keeled ; 

 sometimes minutely downy. Common calyx even. Nectary 

 abrupt, of 2 short acute lobes. Styles a little distant, longer 

 than their feathery stigmas, which are repeatedly subdivided, as 

 in the next species. 



A coarse grass, but not unacceptable to cattle, making a great 

 part of the hay in marshy lands. It is sometimes viviparous, but 

 sparingly. Leers is not correct in his figure of the stigmas. 



2. Qi.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.\l9. 



Festuca fluitans. Linn. Sp. PlWl. mild. v. 1 . 426. Huds. 4G. 



