90 
SPIKELETS AND [CH. 
Lepturus, Spartina, Cynodon, Gastridium, Lagurus, Poly- 
pogon, Leersia. 
SPIKELETS with one perfect flower and one or more male or 
rudimentary ones. 
Digraphis. Holeus. 
Anthoxanthun. Arrhenatherum. 
And the rare genera Hierochloe and Panicum. 
SPIKELETS with at least two perfect flowers. 
Molinia. Triodia. 
Arundo. Sesleria. 
Avena. Keleria. 
Aira (some species). Melica (one species). 
Bromus. Briza. 
Cynosurus. Poa trivialis, 
Dactylis. Catabrosa. 
SPIKELETS with at least three perfect flowers and usually more. 
Elymus. - Festuca. 
Agropyrum. Poa. 
Brachypodium. Glyceria. 
Lolium. 
INFLORESCENCE, a spike of single spikelets. 
Agropyrum. Lolium. 
Brachypodium. Nardus. 
And varieties of Festuca Myurus and F. loliacea, &c. 
INFLORESCENCE, a spike of pairs or tufts of three or 
more spikelets. 
Elymus (pairs). Cynosurus (clusters). 
Hordeum (threes). 
INFLORESCENCE, a cylindrical closely tufted spike-like panicle. 
Phleum. Psamma. 
Alopecurus. Anthoxanthum. 
