vil] FLORAL CHARACTERS 115 
The difficulty is most likely to occur with varieties of /. ovina 
and Ff’ 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. 
+ Awns terminal, or sub-terminal ; often very short 
or nearly obsolete and the palez merely drawn 
out at the tips to a hard sharp awn-point. 
© <Awns long and sub-terminal, inserted 
between the teeth of the cleft apex of the 
palee. Sheaths entire. Panicle usually 
nodding. 
Bromus. 
With the exception of Festuca Myurus and one or two other rare 
Fescues with setaceous leaves, Hordewm and Brachypodium 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. 
Palee broad and distinctly nerved. Awns 
Jine, about as long as the palec. 
B. arvensis, L. 
There are several varieties, of which B. secalinus with a looser 
panicle, and BL. mollis with a more compact panicle and very 
downy, are the chief. 
== Sprtkelets lanceolate and with conspicuous 
awns. Nerves on the palee obsolete. 
xz Panicle conspicuously loose and drooping 
and awns long, palee narrow and elon- 
gated. 
z WSheaths with long often reflexed hairs. 
A shade-grass over three feet high. 
Bb. asper, Mull. 
8—2 
