MACLOSKIE: GRAMINE./E. 197 



25. ERIACHNE R. Br. 



Leaves convolute-terete, rarely plane. Panicle dense or. lax. Spikelets 

 equally 2-flowered. Glumes 4, 2 of them empty, many-nerved, keeled, 

 acute, subequal ; 2 floral glumes equal, fewer-nerved, dorsally ciliate, awn- 

 less or smiigJtt-awnecl t at length indurated with the enclosed palea around 

 the free grain ; palea 2-toothed or 2-awned. 



Species 22, chiefly Australian ; some in tropical Asia. 



E. MALOUINENSIS Steud. 



Culm divided from the base, ascending, 12 cm. high. Basal leaves 

 fasciculate, convolute, one third as high as the culm ; culm-leaves only 6 

 mm. beyond their sheaths. Panicle simple, the rays i -flowered. Glumes 

 ovate-obtuse, yellow-white and purple. 



Magellan ; Falklands. 



26. AIROPSIS Desv. 



Low annuals with nearly subulate leaves and a narrow panicle of sub- 

 equal, 2-flowered globose Spikelets, having a very short rachilla continu- 

 ing the pedicel. Empty glumes 2, obtuse, awnless ; floral glumes 2, 

 slightly shorter, at length rigid and enclosing the grains. 



Species 2 ; one in W. Eur. and N. W. Afr. 



A. MILLEGRANA Gris. (Eragrostis airoides Nees.) 

 Culm strict, simple ; sheaths hairy-margined ; /eaves convolute, smooth. 

 Panicle long, spreading, its rays semiverticillate. Spikelets shorter than 

 the pedicels, oblong. Floral glume shortly serrulate, as long as the 

 flowers. 



(Brazil) ; N. Patagon. 



27. AIRA Linn. Hair-grass. 



Mostly annuals with narrow leaves and contracted or open panicles 

 having capillary rays. Spikelets small, 2-flowered. Glumes 4, hyaline ; 

 2 empty, subequal, acute, persistent; also 2 floral glumes, deciduous, 

 dorsally awned below the middle ; palea a little shorter. Grain enclosed 

 in the glume and palea. 



Species 6, in Eur. and N. Afr. ; one in all temperate lands. 



(Forms having the rachilla produced are removed to Deschampsia.} 



