INDIVIDUAL SPECIES. 23 
Phieum pratense. 
This grass is a complete exotic to all the present areas, and 
its seed was only introduced to the farm in 1901.' Its seed was 
sown on Areas 1, 2, 3 and 6 in quantities from 2 lb. to 4 lb. per 
acre. 
It was prominent in the hay crop taken from Area 2 at 2} 
years, but at 54 years it had only a P.c. fr. of 1-5, and in the next 
year it decreased to o-2, Even at 104 years, however, it had not 
completely disappeared. 
With a somewhat heavier seeding its initial history was some- 
what similar on Area 1, but here and on Area 3 its decrease was 
rather more rapid. 
On Area 6, in spite of the drier situation, it had higher per- 
centage frequencies than on Area 1 at corresponding periods, 
although the seeding was lighter. It was not recorded on this 
area at 74 years. 
Apparently therefore, this was one of the least satisfactory 
grasses sown, but it evidently does persist for some years even on 
these situations. Here it seems to be more valuable for hay than 
in a pasture. 
Arrhenatherum elatius. 
The typical species is an exotic to these areas, but its seed 
was included in the seeds-mixtures for Areas 1 and 7. It was not 
recorded on Area 7, and its highest P.c. fr.on Area 1 was 0-3 
after a seeding of 2 lb. per acre. This grass is therefore 
apparently of very little value for these situations. 
Its variety, 4. elatius tuberosum, is indigenous to Areas 1-4, 
and on these areas is a more or less troublesome arable land 
weed. In these pastures, its highest P.c. fr. was 0-7 on Area 2 
at 104 years, and its next highest was 0-3 on Area 4 at I 3% years 
Pasturing conditions, therefore, do not exterminate it, but even if 
it were a desirable pasture plant, it was not sufficiently abundant 
1 The grass must be regarded as a complete exotic in spite of the fact that 
for several years a small colony, about a foot in diameter, existed in a very old 
pasture field on the farm, which was at that time continuously mown for hay, 
This field was remote from the present areas, 
