27O MR. W. A. NICHOLSON ON BOTANY OF SUTTON. 
Eurhynchium prcelongum, B. & S. Wet meadow near house. 
,, swartzii. Hobk. Rough ground near house. 
Amblystegium serpens, B. & S. Hedge. 
Hypnum stellatum, Schreb. Middle marsh. 
ADUNCUM Hedw. 
var. paternum, Sanio 
-Ditch 
r These are two large 
species very abundant 
in ditch on left hand 
going towards Wood 
St., not far from the 
Laboratory. W. H. B. 
,, GIGANTEUM, Schp. Ditch 
,, scorpioides, L. Middle marsh. 
,, cuspidatum, L. Middle marsh, and in wet meadow 
near house. 
Hylocomium squarrosum, B. & S. Wet meadow near house. 
Dicranoweisia cirrata, L.&C. Occurs on thatch at Wood St. 
Hypnum cuspidatum, L., is the predominant species (of 
Moss) in the swamps, and with it are associated Hypnum 
scorpioides, L., and H. giganteum, Schp., W. H. B. 
It will be noted that there are two species of Sphagnum , 
the true Bog-moss, in the preceding list. Most of the other 
Mosses mentioned are of common occurrence, but Fontinalis 
antipyretica, L. is of some interest, as a truly aquatic Moss. 
The Ferns of the district are chiefly represented by the 
Marsh-Fern ( Lastrea Thelypteris, Presl.) which is extremely 
common, and Osmunda regalis, L., not common now except 
in places protected from the depredations of fern-hunters. 
Ophioglossum vulgatum, L., also occurs, as one would expect, 
and Aspleniunr Adiantum-nigrum, L.. Lastrea Filix-mas, 
Presl., Polypodium vulgare, L., while Pteris aquilina, L., is 
found in the drier parts. 
The dominant Monocotyledonous orders are Typhaceae, 
Naiadaceae, Hydrocharidese, Gramineae, Cyperaceae, Juncaceae, 
Iridaceae, Lemnaceae. Sub-dominant are Sparganiaceae, 
Alismaceae, Orchidaceae. The bulk of the aquatic flora, 
excepting Characeae, is included in these families. Presently 
I shall have something to say as to their grouping in plant- 
associations. 
Going on to the Dicotyledones, we find as dominant 
