20 PASTURE STUDIES: SOME RESULTS. 
Thus it is shown that although exotic, one or the other or 
both these grasses may persist to some extent up to 9% years 
under the conditions prevailing on these areas. 
Festuca duriuscula* 
Festuca duriuscula is the commercial name under which the 
seed of a variety of F. ovzna seme was sold before the war. It is 
said by Hunter (7) to be the seed of F. ovina (L.), var. duriuscula 
(Koch), but in any case it is different in many respects from any 
fine-leaved fescue found by the present writer to be indigenous to 
any of the present areas, and even to any areas in any part of 
Wales investigated by him. 
As will be seen from Table IV., its seed was included in the 
seeds-mixtures for several of the present areas, but even though 
sown in quantities from 2 to 3 lb. per acre on Areas 1-3 the grass 
was not recorded on any of these areas. 
On Areas 6 and 7 it was somewhat more successful. On 
Area 6 it was not separated from other varieties of / ovina 
which may have been present at 44 years, but after a seeding of 
2 lb. each of this variety and another commercial variety of 
£”, ovina, the total P.c. fr. was only 2-7. Itis probable, however, 
that this was mainly #. duriuscula, as in other years other varieties 
were only present in very small quantities, and / duriuscula was 
decreasing at such arate that at 74 years it was represented by 
only 0-3 per cent. 
On Area 7 the grass had a P.c. fr. of 2-7 at 54 years, but 
here also it decreased to 1-2 per cent. by the following year. 
These results show that the grass is useless for such situations 
as Areas 1-4, at least after 44 years, and that even on situations 
such as 6 and 7, it is of relatively little value. They certainly do 
not justify the claims generally made for the grass (2), (7), (19). 
1The results for the various forms of fine-leaved fescues are not given 
separately by Armstrong (I). 
2Much of the seed sold in recent years under this name is that of quite 
a different grass—probably even a different species. These grasses have been 
the subject of a special investigation by the writer for some time. 
