S. owt—Vegetation of a Typical Wild Hay Meadow. 417 
Campanulaceae 
Campanula aparinoides Pursh. 
Lobeliaceae 
Lobelia siphilitica L. 
Compositae 
Eupatorium purpureum L. 
Eupatorium perfoliatum L. 
Solidago uliginosa Nutt. 
Solidago neglecta T. and G. 
* Solidago canadensis L. 
* Solidago Ridellii Frank. 
Aster puniceus L. 
* Aster prenanthoides Muhl. 
* Aster paniculatus Lam. 
Erigeron philadelphicus L. 
Helianthus grosseserratus Martens. 
Bidens frondosa L. 
* Bidens connata Muhl. 
* Bidens trichosperma (Michx) Britton. 
Cirsium muticum Michx. 
A summary of the families, genera, and species is given in 
the following table: 
Table I. 
Families, 
Genera. 
Species. 
Musci.. 
4 
4 
Pteridophyta. 
2 
2 
3 
Monocots. 
10 
23 
42 
Dicots. 
24 
42 
61 
71 
no 
Abundance of the Various Species 
The above summary shows that in point of number of species 
the dicots exceed the monocots but it is self evident that a mere 
list or summary of species does not show the actual occupancy 
of the area as it does not consider the numerical abundance of a 
species or the comparative number of individuals. 
As a matter of convenience the data obtained by counting as 
previously described are here grouped in Table 2. In this list 
the species are arranged in the order of their numerical abun¬ 
dance. The strip is divided on the basis of its physical char¬ 
acter and its plant population into five associations as follows: 
(1) Lycopus Caricetum, (2) Carieetum, (3) Calaimagrostis 
Car ice turn, (4) Ly copus Caricetum', (5) Caricetum. 
