THE TRIBES AND THEIR GENERA. 



Brachypodium. Inflorescence really a simple raceme, but 

 appearing like a compound spike. Florets many, almost cylin- 

 drical, shortly stalked or sub-sessile, edgeways to rachis. Glumes 



opposite, unequal, awnless. Outer 

 palea rounded on the back, usually 

 awned from apex, margin entire, 

 nerves seven to nine, laterals arched 

 and converging. Inner palea pec- 

 tinately fringed on ribs. Stamens 

 three. Stigmas two, inserted at or 

 near apex of ovary. Style very 

 short. Grain adherent to paleae ; 

 starch grains simple and roundish. 



Brachypodium sylvaticum. 

 Floret. For Spikelet see p. 81. 



Species. 



B. sylvaticum, 60. 

 B. pinnatum, 61. 



Hordeurn, 52-55. 

 Elymus, 51. 



HORDED. 



Style one. Nardus, 50. 

 Styles two. 



Spikelets in threes. 

 Spikelets in pairs. 

 Spikelets in ones. 



Axis jointed at each notch. Lepturus, 49. 

 Axis not jointed at each notch. 

 Spikelets close, Loliurn, 58, 59, 

 Spikelets distant, Agropyrum, 56, 57. 



Nardus. Spike slender, unilateral. Spike- 

 lets sessile in the notches of the continuous 

 wiry stem ; not opening in flower ; both 

 series close together. Florets one. Glumes 

 only one, small, indistinct, grown to the stem. 

 Outer palea narrow, pointed or awned, em- 

 bracing inner palea, which is smaller. No 

 lodicules. Stamens three; filaments slender, 

 shorter than the glume; anthers oblong. 



Nafdus stricta. 

 Ovary and stigma. 



Style single, slender, long, downy. Stigma For Spikelet see p. u6. 



