42 THE ORDER AND ITS TRIBES. 



florets and generally articulated above the glumes, which often 

 remain after the fall of the paleae. Distinct internodes between 

 the florets. Spikelets in panicles or apparent spikes. Glumes 

 generally shorter than inner palea ; inner palea awnless or with 

 from one to many awns, which are usually terminal, rarely 

 dorsal, and straight, though occasionally geniculate. Inner 

 palea with two keels. Embryo, as a rule, small ; starch grains 

 mostly compound. 



Represented in Britain by fourteen genera, Sesleria ioo, 

 Arundo 101, Triodia 98, Molinia 95, Koeleria gg> Catabrosa 94, 

 Melica g6, 97, Briza 77, 78, Dactylis 74, Cynosurus 75, 76, Poa 

 79'93* Festuca 69-73, Bromits 62-68, Brachypodium 60, 61. 



Chlorides. Spikelets with one or more florets, in two series 

 upon one side of the continuous rachis ; outer palea deciduous 

 with the fruit, the glumes rarely falling with them. Inner 

 palea with two nerves. Styles distinct ; stigmas projecting 

 from the sides, occasionally from just below the apex. Seed free, 

 unfurrowed ; starch grains generally compound. 



Represented in Britain by two genera, Cynodon 47, Spartina 48. 



Horded. Spikelets sessile on notches of the rachis, in two 

 or more rows, forming an equilateral or (rarely) unilateral spike. 

 Florets one or more, uppermost floret imperfect when there are 

 more than one. 



Represented in Britain by six genera, Nardtis 50, Lolmm 58, 59, 

 Lepturus 49, Agropyrum 56, 57, Hordeum 52-55, Elymus 51. 



