Postelsta 67 
formation. Towards the front, it is made up 
almost entirely of Equisetum jluviatile and 
Equasetum fluviatile polystachyon. Farther back 
in some places Hippurus vulgaris and Veronica 
scutellata are also met with. 
Juncus-Ranunculus society—This occurs on 
sandy front beach and extends from the water’s 
edge back for only a short distance. It is made 
up of Juncus paucicapitatus and Ranunculus 
intermedius. ‘The former in this situation has a 
different habit of growth from that which it as- 
sumes when growing in swampy places in the 
forest, where it is frequent. Upon the beach the 
plant is more or less spreading or prostrate and 
the inflorescence is considerably branched. In 
the forest on the other hand it grows more erect 
with much longer stems and inflorescence less 
branched. ‘The other constituent of this society- 
Ranunculus intermedius-has a creeping habit of 
growth. Stems several decimeters in length are 
found creeping along and frequently striking root 
into the sandy soil. As far as my observations 
go these two prostrate types are the only tenants 
of the front sandy beach. They both grow only 
