UO GLUMACE. 



8. P. Chaixii. Tufted ; stems 2-3 feet high, 2-edged ; leaves 

 and their sheaths rough ; panicle loose, often more than 6 inches 

 long ; spikelets 3-, rarely 5-flowered ; flowering glumes with 5 gla- 

 brous veins. Very shady places near Kelso and a few other places 

 in Scotland and England ; naturalised. Fl. June, July. Perennial. 



9. P. palustris (Marsh Meadow-Grass). Tufted ; stems glabrous ; 

 leaves rather narrow, scabrid ; ligules oblong, acute ; panicle large ; 

 spikelets acute, 2-5-flowered ; flowering glumes obscurely 5-veined, 

 hairy on the keel and margins near the base. Marshes ; very local ; 

 probably introduced. Fl. June, July. Perennial. 



10. P. trivialis (Rough Meadow-Grass). Very much like P. pra- 

 tensis, but the rootstock is not creeping, the sheaths of the leaves 

 are usually slightly rough, and the ligules are much longer and 

 pointed ; spikelets usually 2-flo\vered. Meadows, etc. ; very 

 common. Fl. June, July. Perennial. 



*** Perennial ; rootstock far-creeping 



n. P. pratensis (Smooth Meadow-Grass). Leaves rather narrow, 

 with smooth sheaths ; ligules short, obtuse ; panicle 2-3 inches 

 long, loose ; spikelets mostly stalked, each about 4-flowered ; 

 flowering glumes rather obtuse, with very faint lateral nerves, 

 minutely hairy on the keel. Meadows, etc. ; very common. Fl. 

 June, July. Perennial. (PI. xcv.) 



12. P. compressa (Flat-stemmed Meadow-Grass) . Similar to the 

 last, but the panicle is rather crowded, and it is distinguished from 

 all the allied species by having much flattened leaf-sheaths. Dry 

 places ; frequent. Fl. July. Perennial. 



34. GLYCERIA (Manna-Grass) 



* Fknvering glumes with 5-7 prominent ribs 



1. G. fluitans (Floating Manna-Grass or Flote-Grass). Stems 

 rather thick, but weak, 2-3 feet high, creeping at the base ; leaves 

 often floating on the water ; panicle erect, slender, 1 foot long or 

 more, with few usually erect branches ; spikelets few, | inch long. 

 Wet places ; common. Fl. June to September. Perennial. 



2. G. plicata (Plaited-leaved Manna-Grass). Very near the last, 

 but it has a compound panicle with more numerous spikelets which 

 are widely spreading when in fruit ; flowering glumes broader. 

 Wet places ; frequent. Fl. June to August. Pe- <nnial. 



3. G. declinala is probably only a dwarf form of G. plicata, with 

 smooth leaf-sheaths, few-flowered spikelets, and the pales longer 

 than the 3-toothed flowering glumes. Wet places ; Hants and 

 Scilly Isles. Fl. June to August. Perennial, 



