MR. W. A. NICHOLSON ON BOTANY OF SUTTON. 27I 
orders Salicaceas, Myricaceae, Polygonaceae, Caryophyllaceae, 
Nympheaceae, Ceratophyllaceae, Ranunculaceae, Saxifragaceae, 
Rosaceae, Leguminoseae, Lythraceae, Onagraceae, Halorrha- 
gideae, Umbelliferae, Primulaceae, Gentianaceae, Labiatae, 
Scrophulariaceae, Lentibulariaceae, Valerianaceae, and Com- 
positae. 
A. F. W. Schimper has divided the aquatic plants into five 
types, often more or less connected by intermediate forms. 
These five types are : — 
1. Isoetes type. Completely submerged rosette-plants, 
rooted in the ground, usually with cylindrical leaves. 
2. Nymphaea-Hippuris type. Plants rooted in the ground, 
Teaching the surface of the water by means of long-stalked 
leaves or long shoots, and therefore partly in the air. 
3. Naias type. Plants rooted in the soil, or free-swimming, 
with long flowing shoots. 
4. Hydrocharis type. Free-swimming plants with short 
shoots, (a) quite submerged, (b) greater part submerged, 
(c) half-submerged, (d) greater part floating on the surface, 
{e) greater part projecting above water. 
5. Podostemon type. Submerged plants fixed to stones 
in running water. 
I am not aware of the existence in the Ant district, of any 
representative of the first, or Isoetes type, though one of the 
type, Pilularia globulifera, L., formerly occurred at two or 
three places in East Norfolk. 
The majority of the aquatic plants about Sutton, belong 
to Schimper’s second or Nymphea-Hippuris type. They 
are “ rooted on the ground, reaching the surface of the water 
by means of long-stalked leaves, or long shoots, and therefore 
partly in the air.” The following are of primary importance, 
on account of the large area they occupy, and their dominant 
position with regard to other species. 
Phragmites communis, Trin. 
SciRPUS LACUSTRIS, L. 
Iris pseudacorus, L. 
Cladium jamaicense, Crantz. 
Ranunculus Lingua, L. 
