ES 
1903] VEGETATION OF THE BAY OF FUNDY MARSHES i he 
some of this water allows the elastic back to curl the leaf and 
close up more or less the grooves and hence protect the stomata, 
one of the most efficient regulatory mechanisms to control trans- 
piration according to water supply known to me. Chlorenchyma 
is palisaded especially towards the inner face; large air spaces 
exist, communicating with those of the root, and the epidermis 
is not wetted by water, all permitting the immersion of the plants 
a 
Fic. 9.—Showing the three typical associations of the salt marsh. The Sparti- 
netum on the left and the Staticetum (with its marginal Statice) on the right are 
advancing upon the Salicornetum in the center. 
for some time. It propagates apparently mostly by root- 
Stocks, and good seeds and seedlings appear to be rare. It is 
wind-pollinated and wind-disseminated. 
Its specific physiological correlations appear to be unstudied. 
On account of the failure of all my seeds to germinate, I was 
unable to determine the resistance of its root-hairs to plasmolysis, 
but analogy with Salicornia would lead us to expect a high degree 
of resistance. 38 
#It seemed to me likely that the power of the halophytes to stand salt might be 
connected with a power in their root-hairs to withstand plasmolysis by 
Accordingly I procured some pure sea-water from Baie Verte, N. B., and, with distilled 
