VllJ FLORAL CHA11ACTER8 115 



The difficulty is most likely to occur with varieties of F. ovina 

 and F. elatior : in the former the leaves are narrower, setaceous and 

 stiffer than in any Poa. The ribbing of the leaf, the ligule, and 

 other characters of the vegetative organs (see pp. 45 and 50) will 

 help in these doubtful cases. 



t Awns terminal, or sub-terminal ; often very short 

 or nearly obsolete and the palese merely drawn 

 out at the tips to a hard sharp awn-point. 



© Aivns long and sub-terminal, inserted 



between the teeth of the cleft apex of the 



palece. Sheaths entire. Panicle usually 



nodding. 



Bromus. 



With the exception of Festuca Myurus and one or two other rare 

 Fescues with setaceous leaves, Hordeum and Br achy podium are 

 the only other genera with awns much resembling the Bromes. 

 The former has a totally different inflorescence, and in the latter the 

 spikelets are practically sessile (see p. 107). 



= Spikelets short and fat, and relatively heavy, 

 Palece hroad and distinctly nerved. Aivns 

 fine, about as long as the palece. 



B. arvensis, L. 



There are several varieties, of which B. secalinus with a looser 

 panicle, and B. mollis with a more compact panicle and very 

 downy, are the chief. 



= = Spikelets lanceolate and loith conspicuous 

 aivns. Nerves on the palece obsolete. 



X Panicle conspicuously loose and drooping 

 and awns long, palece narrow and elon- 



Sheaths with long often rejicxed hcurs. 

 A shade-grass over three feet high. 



B. asper, Mull. 



