XVlll ANALYTICAL ARRANGEMENT 



Genera. Species. Plate. 



! Inner glume of lateral spikelet very much di- 

 lated on one side Hordeum niaritimuin. 10 

 Glumes not dilated Hordeum pratense. 1 1 



PoLYPOGON Polypogon monspeliensis. 1 1 



( Ligule of the upper sheath very short Agrostis vulgaris. 1 2 



( Ligule of the upper sheath long 1. 



( Floret of two palese. Sheaths roughish Agrostis alba. 13 



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



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



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



Anemagrostis AnemagrostisSpicaventi. 17 



Milium Milium effusum. 17 



C Calyx containing one floret with a rudiment of 



a second Melica uni flora. 18 



1 Calyx containing two florets with a rudiment of 



t a third Melica nutans. 18 



AmocHLOA. -4 irochloa cristata. 1 9 



\ Outer palea five-ribbed Molinia depauperata. 1 9 



MoLiNiA. I ^^^^^ ^^j^^ three-ribbed Molinia ccendea. 20 



Catabrosa Catabrosa aqviatica. 20 



t AwTi of the floret smooth Holcus lanatus. 21 



I Awn of the floret rough Hok^os mollis. 21 



, Awns not protruding beyond the florets 1. 



AiRA. \ Awns protruding considerably beyond the flo- 



( rets 2. 



r Awn arising from a little above the base of the 



palea Aira cmspitosa. 23 



I Awn arising from a little above the centre of the 



t outer palea Alra alpina. 23 



( Sheath of leaf rough from above do^vn wards Airaflexuosa. 24 



I Sheath of leaf rough from below upwards 3. 



^ Panicle spreading Aira caryophyllea. 24 



(Panicle close Airapracox. 25 



Arrhenatherum •• ArrJienatherum avenacemi. 25 



