GRAMINE^ 179 



Tribe i. Oryze^. — Spikelets compressed laterally; 

 lower (barren) glumes minute or o; uppermost glume 

 and pale bearing a single flower. Not alpine. 



1. Leersia, Sol. 

 Characters of the tribe. 



L. oryzoideSy Sw. {Oryza clandestina^ Br.) ; panicle 

 often undeveloped ; in water, rare. 



Tribe Panice^e. — Spikelets usually compressed dor- 

 sally ; terminal glume only bearing a flower. Not alpine. 

 Genera 2-4. 



2. Panicum, L. 



Glumes 4 ; pedicel of spikelet naked or hairy. 



P, glabrmUj Gaud. {Digitaria hufnifusa, Pers.) ; spike- 

 lets about 3, digitate, leaves and sheaths glabrous ; road- 

 sides, occasional. P. ciliarey Koel. ; leaves and sheaths 

 hairy, empty glume ciliate ; road-sides, local. P. saiigui- 

 nale. Scop. ; similar, but empty glume not ciliate ; road- 

 sides. P. Crus - Gallic L. (Echinochloa Crus - Gal/z, 

 Beauv.) ; spikelets in racemes or panicles, glumes awned ; 

 road-sides, common. P. undulatifoliitm^ Ard. {Oplis- 

 menus undulatifoliuSy Beauv. j ; leaves broad, stem and 

 leaf-sheaths with long hairs ; Ticino. 



3. Setaria, Beauv. 



Glumes 4 ; pedicel of spikelet with stiff bristles. 



5. viridisy Beauv. ; bristles clustered, scabrid ; road- 

 sides. vS. verticillata, Beauv. ; bristles single or in pairs, 

 barbed ; road-sides, rare. ^. glauca, Beauv. ; spikelets 



