Heath Association on Hind head Common. 163 
It is even now apparent that the vegetation, which will finally 
become established on the gravel, will bear a decidedly different 
aspect, at any rate for some time, to that on other parts of the 
heath ; the Ericaceous forms (particularly Erica), as well as Molinia, 
will first be dominant, the gorse probably quite subsidiary. 
In conclusion we should like to acknowledge our indebtedness 
to Mr. A. G. Tansley for much helpful criticism. 
July, 1912. 
EXPLANATION OF PLATE V, 
Illustrating Paper by Professor Fritsch and Miss Parker 
on “The Heath Association on Hindhead Common.” 
Fig. 1. End of central ridge, seen from a point corresponding approximately 
to the letter N in the right hand lower corner of Text-fig. 1. The top of the 
ridge is occupied by the C U facies, which is separated by a sharp line from 
the CUE facies lower down. The vegetation in the foreground belongs to 
the slopes on the opposite (north-west) side of valley B. 
Fig. 2. Line of separation of C U and CUE facies on the north-west 
side of the central ridge. 
Fig. 3. Exposed gravel on south-eastern slopes of central ridge, partly 
occupied by Erica cinerea and Molinia. In the background extensive patches of 
C U, which have slipped down from the ridge above, are visible. The edge of 
the ridge is seen on the horizon. 
Fig. 4. Burnt patch (burnt 1911), first year growth of Ulex. July, 1912. 
Fig. 5. Burnt patch (burnt 1909). Ulex minor regenerating on burnt 
ground and infested by Cuscuta. 
(Figs. 2, 3, 4 from photographs by Mr. W. B. Johnson ; the rest from 
photographs by F. E. Fritsch. 
