104 THE GENERA AND THEIR SPECIES. 



Hordeum. Plate xvii. HORDEZE. 



Outer floret perfect ; middle floret barren. 



52. sylvaticum 36 in. Wood Barley. Spikes and leaves of 



similar green. 

 Outer floret barren ; middle floret perfect. 



53. pratens$ 24 in. Meadow Barley, Bright green ; outer 



glumes of all spikelets rough ; inner palea 

 lanceolate. 



54. murtnum 12 in. Wall Barley. Dull green; outer 



glumes of middle spikelet ciliated. 



SS.maritimum 9 in. Squirrel-tail. Glaucous ; outer glumes 

 of all spikelets rough ; inner palea semi- 

 ovate. 



52. H. sylvaticum. A woodland speoies, thriving in shade, 

 ranging throughout Europe, but not found in Scotland. July and 

 August. Root perennial, fibrous, loosely tufted. Stems erect 

 from a curved base, striated, smooth or nearly so ; nodes rather 

 hairy. Leaves lanceolate, many ribbed, flat, rough, pointed, 

 auricled at base, slightly notched. Sheaths ribbed, clothed with 

 long deflexed hairs ; ligule short and slightly notched. Spike 

 erect, fusiform, dense, green ; rachis furrowed and angular, 

 notched alternately. Spikelets clustered in threes in each notch, 

 middle one with one floret generally barren, outer one with 

 one perfect and occasionally one imperfect floret. Glumes of 

 perfect florets awl-shaped, not ciliated, equal, broad, long, three- 

 ribbed, fringed and awned. Outer palea shorter than glumes, 

 five-ribbed, hairy at base, ending in a straight awn, twice as long 

 as palea, rising from below the terminal notch ; inner palea two- 

 ribbed, with a bristle at its base. 



53. H. pratense. Moist pastures in the Northern Hemi- 

 sphere, but in Britain not further north than Berwick. Root 

 perennial, small, fibrous, occasionally bulbous in barren ground. 

 Stem slightly ascending at base, occasionally decumbent, then 



