Vl] INFLOEESCENCES 91 



Inflorescence, a compact more or less tiofted panicle. 



Molinia. Aira prmcox. 



Koderia. A. canesaens. 



Triodia. Sesleria. 

 Dactylis. 



And rare grasses like Polypogon, Gastridium, &c. 



Inflorescence, a loose plume-like or branched panicle. 



Avena. Milium. 



Bromus. Agrostis. 



Arrhenatherum. Melica. 



Gatahrosa. Holcus. 



Aira (except A. proecox and Poa (most of the species). 



A. canescens). Glyceria. 



Antndo. Briza. 



Digraphis. Festuca (except F. Myurus). 



And the rare Hierochloe. 



The Glumes are always present in our grasses, and 

 rudimentary only in the rare grass Leersia; but Lolium 

 and Nardus have only one glume to the spikelet, and 

 Hierochloe, Digraphis and Anthoosanthum (Fig. 32) have 

 four or six. Our other grasses have two, but often unequal 

 in size. 



In shape they are usually boat-like, pointed or obtuse 

 {Briza) and frequently with a distinct keel (Anthoxanthum, 

 Digraphis, Phleum, &c.) or with ridges, green lines (veins) 

 and other characteristic markings (e.g. Digraphis). The 

 tip may be extended into a stiff long point or awn (Ag- 

 ropyrwm, Phleum, Nardus) and the keel, ribs, and awn 

 may have hairs or serrulse on them. The rule is, how- 

 ever, that the glumes are not awned. In texture the 

 glumes may be herbaceous and green-brown or pui-ple 



