« 
Reconquest of the Water 
Rowing across such a lake near the shore, one notices 
a border of tall reeds or bulrushes ; behind this, on the 
landward side, marsh plants are generally to be found, 
and often in profusion. Above the reeds and behind 
the marsh plants one may see the foliage of willows, 
alders, and birches which occupy the border of the 
land, which is, in their territory, more or less wet and 
possibly sometimes submerged. 
Zone of Pota- 
Rush Zone of Zone of Zone of mogetons, Milfoil with 
Zone Marsh Plants Reeds Water-lily floating plants, Lemna, etc. 
XK A. A. de ¢k. 
roomy v" Vv v 
Diagram to show Land-formation by Pond Plants 
On the water side of the reeds there is very often a 
zone of yellow and white water-lilies. 
In much deeper water such plants as pondweed, 
milfoil, and a few others are still able to flourish, and 
their reddish-brown spikes may be seen standing out of 
the water at the right season. 
But a small diagram is necessary to show how they 
work together in the process of filling up the lake. The 
important member of the series is what may be called 
the “reed association.” 
It may consist of bulrushes or of Scirpus lacustris 
130 
