130 TERMINAL AWN 
‘[CH. 
straight, hooked, or kneed (i.e. sharply bent); twisted or 
not; smooth or serrulate. They may be inserted at the 
base or near the middle of the back of the investing 
palea, or glume, or near its apex, as indicated by the 
terms basal, dorsal, sub-terminal (see Figs. 47—50). 
Some difficulty arises in connection with terminal 
awns. In some cases there is a true 
awn—i.e. a distinct bristle or hair 
—at the apex of the palea, and 
apparently continuing its substance 
without interruption; but im most 
instances close examination shows 
that this awn arises from between 
two minute teeth, and is really in- 
serted at the back of the slight de- 
pression between them—e.g. Lolium 
temulentum (Fig. 48), Brachypodium 
pinnatum (Fig. 77), &e. 
In another class of cases the awn 
appears to be really the prolongation 
of the palea—e.g. Nardus (Fig. 81), 
Festuca Myurus (Fig. 80), &c.—and 
when it runs out into a distinct 
bristle we may speak of a terminal 
awn without staying to discuss 
whether or no it is really terminal 
in development. | 
In Arundo, Cynosurus and some 
\/ 
\ 
Fig. 49. Agrostis Spica- 
venti. c, ‘*seed,” nat. 
size; a and b, ditto, 
x about 9. The long 
slender awn is insert- 
ed below the bifid tip 
of the palea. Nobbe. 
Fescues, where the palea tapers off into a stiff long point, 
I have not spoken of it as an awn, but have described the 
