6 A, G. Tansley. 
I]. DETAILS OF THE ExcuRSION. 
The party assembled in Cambridge on Tuesday, August Ist. 
The morning was spent at the Botany School, and lunch was taken 
in the hall of Emmanuel College by permission of the Master and 
Fellows. The afternoon was spent at the Botanic Garden, round 
which the party were conducted by the Curator. Afterwards Dr. 
Moss demonstrated the numerous species and varieties of Ulmus, 
on which he had recently been working, to be met with in the Backs. 
On the morning of Wednesday, August 2nd the party met on 
Sheep’s Green and spent some time examining the riverside and 
submerged vegetation of the Cam, where the submerged forms of 
many of the common riverside plants were specially noted. The 
river was then ascended in punts and canoes as far as Grantchester, 
where the party were entertained at lunch by Mr. and Mrs. Tansley. 
In the afternoon some of the Colleges were visited and in the 
evening a dinner was given by Professor Seward and Mr. Blackman 
in the Combination Room of St. John’s College. 
A very early start was made on August 3rd, the party leaving 
Cambridge by the 6.45 train for Norwich and Brundall, where it 
was joined by Miss M. Pallis, who is engaged in a very thorough 
study of East Norfolk vegetation, and who acted as local guide. 
The much shrunken remnants of Surlingham Broad, situated in a 
bend of the River Yare, were first visited by boat. The old Ordnance 
Map published in 1838 shows this broad as a wide sheet of water. 
The aquatic vegetation, the reedswamp and fen are all characteristic 
of the Yare valley type. The broad is strongly affected by the rise 
and fall of the tide so that the “hover” or floating reedswamp 
dominated by Glyceria aquatica sometimes rests on the muddy 
bottom and sometimes floats over three or four feet of water. The 
fen and incipient “carr” (fen wood) with its considerable variety 
of shrubs were cursorily inspected. The party then returned to 
Brundall, proceeded by train to Buckenham, and after lunch at 
the Buckenham Ferry Hotel visited Rockland Broad, also by boat. 
Rockland Broad is the last broad in the valley of the Yare. Here 
very fine swamp carr (woodland which has established itself on 
reedswamp) was visited, and the absolutely natural condition of 
this type of vegetation greatly pleased the members of the party. 
Professor Massart obtained some excellent photographs. There 
was some discussion as to the röle of Phragmites vulgaris in relation 
to fen and reedswamp. After returning to Buckenham the party 
took train to Yarmouth, passing across considerable tracts of 
pasture developed on loam and probably occupying the site of 
saltmarsh which originally developed in the old estuary of the Yare. 
Supper was taken in Yarmouth and the party then proceeded by 
train to Hemsby and Sutton, where the night was spent. 
On Friday morning Sutton and Barton Broads (belonging to 
the River Ant) were visited in boats. The distinctive feature of 
this system of broads is the widespread association of Scirpus 
lacustris and rooted “ floating-leaf” aquatics. Professor Cowles 
remarked on the great similarity of this vegetation to certain North 
American aquatic vegetation, the plant-forms, the generaand even 
many of the species being identical. The aquatic association of 
