﻿XV111 ANALYTICAL ARRANGEMENT 



Genera. Species. Plate, 



r Inner glume of lateral spikelet very much di- 



l 1 lated on one side Hordeum maritimum. 10 



( Glumes not dilated Hordeum pratense. 11 



Polypogon Polypogon monspeliensis. 1 1 



( Ligule of the upper sheath very short A qrostis vidqaris. 1 2 



Agrostis. ] . ° r 



{ Ligule of the upper sheath long 1. 



i Floret of two paleae. Sheaths roughish Agrostis alba. 1 3 



\ Floret of one palea. Sheaths smooth A grostis canina. 1 5 



Calama- \ Hairs shorter than the floret Calamagrostis stricta. 16 



grostis. ( Hairs longer than the floret Calamagrostis Epigejos. 16 



Anemagrostis AnemagrostisSpicaventi. 17 



Milium Milium effusum. 17 



Calyx containing one floret with a rudiment of 



a second Melica uniflora. 18 



Calyx containing two florets with a rudiment of 

 t a third Melica nutans. 18 



Airochloa. . . Airochloa cristata. 1 9 



! Outer palea five-ribbed Molmia depauperata. 1 9 

 Outer palea three-ribbed Molinia cosrulea. 20 



C at abrosa Catabrosa aquatica. 20 



Awn of the floret smooth Holcus lanatus. 21 



Holcus. 



Awn of the floret rough Holcus mollis. 21 



iAwns not protruding beyond the florets 1. 

 Awns protruding considerably beyond the flo- 

 rets 2. 



{Awn arising from a little above the base of the 

 palea Aira caispitosa. 23 



Awn arising from a little above the centre of the 

 outer palea Aira alpina. 23 



( Sheath of leaf rough from above downwards... . .Airaflexuosa. 24 



( Sheath of leaf rough from below upwards 3. 



( Panicle spreading Aira caryophyllea. 24 



\ Panicle close Aira prmcox. 25 



Arrhen atherum Arrhenatherum avenaceum. 25 



