188 88. GRAMINE^E. 



123. BRIZA. Glumes and glumellas obtuse, awnless, outer glu- 

 mella boat -shaped, 3-ribbed. Panicle lax and spreading. 



24. POA. Spikelets compressed, awnless, ovate or linear, some- 

 times cylindrical. Glumes unequal. Lower glumella 3 7, 

 veined, compressed, scariose at the apex, bluntish, rarely 

 pointed. 



25. FESTUCA. Panicle lax or coarctate. Spikelets many-flowered. 

 Glumes unequal. Outer glumella-lanceolate, acute or awned 

 from a little below the tip; lateral veins converging and 

 vanishing below the apex ; inner glumella minutely ciliate on 

 the ribs. 



26. BROMUS. Spikelets compressed, many-flowered. Glumellas 

 rounded on the back, membranous at the summit, 2 of the 

 lateral nerves uniting, and forming a long dorsal awn from a 

 little below the bifid point. 



4. Spikelets with numerous florets, mostly sessile, upon 

 opposite sides of the rachis. 



27. ELYMUS. -Spikelets in pairs from the same joint of the 

 rachis. Glumes 2, both on one side of the spikelet, outer 

 glumella ciliate on the midrib. 



28. TRITICUM. Spikelet with its side next the rachis. Glumes 2, 



nearly equal. Glumella minutely ciliate on the ribs. 



29. BRACHYPODIUM. Spikelet with its side next the rachis, very 

 shortly stalked, distant. Glumes opposite, unequal. Upper 

 glumella coarsely fringed on the ribs. 



30. LOLIUM. Spikelet with its back to the rachis. Glume 1, 

 opposite the rachis, or if 2, the inner small. 



SPECIES OF GRAMINE/E. 



1. NARDUS. Mat-grass. 



K". STRICTA, L. Stems densely tufted, wiry, erect, 6 12 in. 

 high. Le. involute, setaceous, stiff and bristle-like, suddenly 

 bent from their sheaths. Spike long, slender. Spikelets uni- 

 lateral, in 2 rows. Glumella narrow with a long point. 



Very common. On moors and heaths. (B) P. 6. Fossil marsh; Cathkin hills; 

 from Gourock to Arran. 



2. ALOPECtfnus. Fox-tail-grass. 



1. A. PRATENSIS, L. Meadow Fox-tail-grass. Stem erect, 

 smooth, 1 2 ft. high. Sheaths of the upper le. somewhat in- 

 flated. Spike 23 in. long, cylindrical. Outer glumes with 

 short hairs on the keel and lateral ribs. Awn projecting more 

 than half its own length beyond the apex of the glumella. 

 Very common. Meadows and pastures. (B) P. 5 6. 



