session 1909-1910. 
lvii 
In the afternoon a garden party was given in the grounds of 
Trinity College by Mr. William Erasmus Darwin, Sir Gfeorge 
and Lady Darwin, Mr. Francis and Miss Frances Darwin, 
Major and Mrs. Leonard Darwin, Mr. and Mrs. Horace Darwin, 
Mrs. Litchfield, and Miss Darwin. 
This enjoyably concluded the celebration. During it there 
was an exhibition, in the Old Library of Christ’s College, of 
portraits, books, and other objects of interest in connection 
with Darwin, and, in the Sedgwick Museum, of rock-specimens 
collected by him during the voyage of the “ Beagle,” while a few 
of the most interesting volumes in his Library were displayed 
in the Botanical Museum. 
Field Meeting, 21st May, 1910. 
COLNEY HEATH. 
This meeting was arranged for the botanical investigation 
of the river and gravel at Colney Heath, and was under the 
direction of Mr. E. J. Salisbury, B.Sc., F.L.S. The members 
walked to the heath from Smallford Station, passing some 
interesting ditches on the way. 
On reaching the heath the river-side flora was examined. 
At the edge of the furze and bordering the marshy ground was 
a fringe of rushes, and between these and the river a broad belt 
of saturated and turfy hummocks. Here were Stellaria uliginosa 
with its apical hydathodes and nectaries on the filaments of the 
longer stamens. Triglochin palustre, Trifolium fragiferum, and 
the rare water-blinks ( Montia fontana ) were also here in 
abundance. In the shallow water were a number of plants 
characterized by their upright habit, such as Iris pseudocorus, 
Equisetum limosum , Sparganium ramosum, and (Enanthe fistulosa. 
In the deeper water a number of snails were obtained by 
fishing from amongst the potamogetons and Ranunculus 
aquatilis. 
Passing on to the peaty ground beyond, an association of 
Nardus stricta on Juncus squarrosus was encountered, and here 
too were to be found the dog-violet, the needle-furze, and the 
wood cudweed. 
After a short examination of the ponds the party came to the 
gravel association on the south-west side of the heath. The 
chief plants met with here were the bird’s-foot ( Ornithopus 
purpusillus ), Alchemilla arvensis, Moenchia erecta, and Aira 
prsecox. 
VOL. xiv.—PART IV. 
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