8 ;6 
Wilson.—Plant Distribution in the 
In support of this view the greater luxuriance of the vegetation on the 
deeper parts of the deposit may be cited ; the similar increase in abundance 
of Car dims pains tris, a plant commonly found in damp situations, may also 
be given. 
The Moss distribution also leads to the same conclusion. Polytrichum 
juniperinum, found on the shallowest soils, is strongly xerophytic, possessing 
inrolled leaves provided with lamellae on the upper surface. In Poly¬ 
trichum attenuatum, occurring on the slightly deeper deposit, the leaves are 
larger and flat but retain the lamellae. Mnium hornum and Catharinea 
undulata possess flat leaves of the usual structure and are typical mesophytic 
species. Finally, in Mnium undulatum, which is found on the deepest soil 
and is a commonly occurring species in damp woods, the leaves are large, 
flat, and very delicate in structure. These species form a series showing 
diminishing xerophytic characters with the increase in depth of the soil. 
The Clay with Flints is known to vary considerably in composition 
and the percentage of lime may be another factor in determining the above 
zonation. 
(b) Rice Wood lies a short distance to the south-west of Badgin 
Wood (Text-fig. 2). Here the Clay with Flints, instead of presenting a 
level surface, is found sloping to the north-east, and the flora occurring on it 
exhibits several differences from that found on the deposit in Badgin Wood. 
Rice Wood consists of copse with standard Oaks, and while the species 
making up the underwood are generally similar to those occurring on the 
deeper Clay of Badgin Wood there is an increased amount of Castanea 
sativa, Mill. On the whole the wood is considerably damper, and although 
the soil is not more than eight feet in depth in any place the vegetation with 
some exceptions resembles that found on the deepest soil in Badgin Wood. 
Anemone nemorosa, L., occurs in great abundance and flowers freely under 
the shade condition. Primula acaulis, L., is found in only slightly smaller 
numbers. Oxalis Acetosella, L., a species not present in Badgin Wood, 
occurs sparingly. 
A portion of the copse was felled during the winter of 1909-10, and 
this area is now at the commencement of the second year’s growth. During 
the first season Anagallis arvensis , L., and Gnaphalium idiginosum, L., were 
abundant and flowered feely. Hypericum perforatum, L., Carduus palus^ 
tris, L., and Sanicula europaea, L., occurred in abundance in the vegetative 
condition. Bryophytes are present in much greater numbers than in Badgin 
Wood. Mnium undulatum, L., is abundant, while Plagiochila asplenioides^ 
L., and Porotrichum alopecurum (L.), Mitt., are frequently found. 
Zonation of Polytrichum juniperinum, Willd., and Polytrichum attenua- 
tum, Menz., similar to that already described in Badgin Wood occurs near 
the western limit where the deposit of Clay thins out in the vicinity of the 
Chalk (Text-fig. 2). The zone of Polytrichum juniperinum is found nearer to 
