54 
FOURTEENTH REPORT. 
Scirpus americanus but the numerous seedlings of red maple and wil- 
lows give evidence of how rapidly a bog could be formed if it were 
not for the wave action during the summer and the far more serious 
ire work during the winter. 
hist of the Species 
of the Scirpus americanus Association: 
Scirpus americanus. 
DOMINANT SPECIES. 
SECONDARY SPECIES. 
Cteiculuria cornutci. Oxy polls rigidior. 
E lodea canadensis. 
RELIC SPECIES. 
Scirp us valid us. Potamogeton richardson ii. 
Elcocharis palustris vigens. 
INVA1 
Scirpus valid us (in reversal of s 
cessions) . 
L yeo p us a merwanus. 
Soli dago graniin ifolia. 
Iris versicolor. 
S parti iui, rnichauxiana. 
Acer rubrum (seedlings). 
Cornu, s* stolonifera (seedlings). 
Clad i u 
DING SPECIES. 
uc- Salix lucida (seedlings). 
J uncus hulticus littoralis. 
E u pa tori u in perfo Hat u n i . 
Alims inewna. 
Lys in i a eh i a ten * es tris. 
Salix longifolia. 
Poten tilla a user i no. 
Hyperion in virgin icu in. 
' in mariscoidcs. 
The Cladiwm mariscoidcs Association. 
This association of rush-like plants, entirely dominated by Cladium 
mariscoidcs. was very poorly represented in this region. It occurred 
along the west shore of Douglas Lake at the edge of a cedar bog. It 
was also present in a few other places where bogs were in the initial 
stages of their development. Everywhere it presented the same appear- 
ance — a dense growth of the rush with a very few secondary species 
towards the margins. 
List of the Species of the Cladium mariscoides Association: 
DOMINANT SPECIES. 
Cla<li inn mariscoidcs. 
SECON DA R Y SPECIES. 
Cot cut ilia palustris. 
L o he lia < '(I rdinali s. 
Hypericum virginicum. 
A sclepias incarnate. 
D u l ich i a m a ru n d i nace uni. 
Carex oederi piimila. 
Scirpus valid us. 
