Stout—Vegetation of a Typical Wild Hay Meadow. 431 
grostis Caricetum is in reality a complex of smaller associa¬ 
tions, for in no section of ten feet do we find any one species 
excluding all others. The facts thus shown together with the 
curves given in plate 20, show the suddenness with which 
dominant species may change. 
Among the species that may he considered as dominants there 
are further various degrees of development and domination. 
This is well shown in the fluctuations in the curves on plate 20. 
At station 75, although Calamagrostis canadensis was very 
abundant it was entirely overshadowed throughout the season 
by Car ex stricta and did not even produce flowers and seeds. 
Hay Production 
To determine the relative weights of the various species in 
the composition of the hay the following plan was used. At in¬ 
tervals of fifty feet the vegetation growing on an area of five 
square feet was cut, sorted, labelled and tied into bundles. 
This was done during the last two weeks of August, 1907. 
The bundles were thoroughly dried under cover and then 
weighed. From the weights, per cents have been computed 
and the total hay production per acre estimated. The total is 
somewhat higher than would be obtained by methods of Wy 
making, due to the fact that there was no waste. 
These facts show the relative hay production of the various 
associations as well as the proportional weight values of the var¬ 
ious species in the hay. The data as to weights are summarized 
in the following table. 
Table 5. 
Lycopus 
Carice¬ 
tum. 
Carice¬ 
tum. 
Calama¬ 
grostis 
Carice¬ 
tum. 
Lycopus 
Carice¬ 
tum. 
Carice¬ 
tum. 
Av. weight per 5 sq. ft. in oz. 
Estimated yield per acre in lbs. 
Per cent Carex stricta by weight. 
Per cent C. canadensis by weight. ... 
Per cent of other grasses by weight.. 
Per cent Carex aquatiltis by weight 
6.3 
3.430 
76 
13 
9 
9.7 
5,281 
78 
21 
13. 
7,078 
15 
36 
7.125 
3,879 
52 
17 
5 
10.5 
5,717 
96 
3 
16 
14 
3 
3 
Per cent Carex Sartwellii by weight.. 
Per cent Carex filiformis by weight.. 
Per cent Carex riparia by weight. 
