THE GRASS TRIBE 325 



Tribe vm. Stipace,e. Spikelcis cylindric, i-flowered, without any 

 rudiment ; outer glumes unequal, membranous, enclosing the 

 flowers. 



14. Milium (Millet-Grass). Spikelets loosely panicled, awnless ; 

 outer glumes 2, concave ; flowering glume concave, hard and shining 

 when in fruit. (Name from the Latin for millet.) 



Tribe ix. Agrostide^e. Spikelets laterally compressed, i-flowered, 

 sometimes with a rudiment as well, or many-flowered ; all the 

 glumes and the pale membranous. 



* Outer glumes shorter than the flowering glume ; style long ; stigmas 

 often protruded near the middle of the flower 



15. Piiragmites (Reed). Panicle very spreading; spikelets 

 several- flowered, with long silky hairs on the axis enveloping the 

 flowers, awnless ; outer glumes unequal, the lower much the smaller. 

 (Name from the Greek phragma, a hedge or enclosure.) 



** Outer glumes longer than the flowers ; style short or none 



16. Ammopiiila (Marram-Grass). Panicle spike-like ; spikelets 

 i-flowered, with hairs on the axis ; flowering glume very shortly 

 awned. (Name from the Greek amnios, sand, and philo, I love ; 

 the plant flourishes in sand.) 



17. Calamagrostis (Small Reed-Grass). Panicle very spread- 

 ing ; spikelets i-flowered, with silky hairs on the axis ; outer glumes 

 nearly equal, keeled, pointed ; flowering glume much smaller, very 

 thin, bearing a hair-like, short, straight awn on its back. (Name 

 from the Greek kalamos, reed, and agroslis, a kind of grass.) 



18. Apera (Wind-Grass). Similar to Agrostis, but the lower 

 glume is smaller than the upper ; flowering glume entire, with an 

 awn inserted a little below the apex, more than 3 times as long 

 as the glume. (Name from the Greek aperos, undivided, having 

 reference to the entire flowering glume.) 



19. Agrostis (Bent-Grass). Spikelets small, numerous, in an 

 elegant spreading or narrow panicle ; outer glumes narrow, boat- 

 shaped, pointed, awnless, equal or the second smaller ; flowering 

 glume shorter, often with a fine straight awn on the back below 

 the middle ; pale much smaller or wanting. (Name from the Greek 

 agrostis, which is applied to a kind of grass.) 



20. Lagurus (Hare's-tail-Grass). Spikelets crowded in an 

 ovoid or oblong, softly hairy head ; outer glumes subulate ; flower- 

 ing glume much shorter, thin, cleft into 2 awn-like points about as 

 long as the outer glumes, bearing on its back a hair-like bent awn 



