vi] INFLORESCENCES 91 
INFLORESCENCE, a compact more or less tufted panicle. 
Molinia, Aira precox. 
Keleria. A. canescens. 
Triodia. Sesleria. 
Dactylis. 
And rare grasses like Polypogon, Gastridium, &c. 
INFLORESCENCE, a loose plume-like or branched panicle. 
Avena. Milium. 
Bromus. Agrostis. 
Arrhenatherum. Melica. 
Catabrosa. HHolcus. 
Aira (except A. precox and Poa (most of the species). 
A. canescens). Glyceria. 
Arundo. 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 Loliwm 
and Nardus have only one glume to the spikelet, and 
Hierochloe, Digraphis and Anthoxanthum (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 (Anthoranthum, 
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- 
ropyrum, Phlewm, Nardus) and the keel, ribs, and awn 
may have hairs or serrule on them. The rule is, how- 
ever, that the glumes are not awned. In texture the 
glumes may be herbaceous and green-brown or purple 
