Heath Association on Hindhead Common. 151 
the heath. Two (if not three) forms of this species must be 
distinguished. In the valleys, along with U. europcnis, there grows 
I 
H 
Text-fig. 2. Diagrammatic sections of the part of Hindhead Common at 
present surveyed. The points at which the sections are taken are indicated 
by arrows at the left-hand side of the map on the opposite page. The cross 
to the right of Valley A shows the position of the former limit of C U and CUE 
facies before the fire of 1911. The horizontal scale is the same as that of the 
map; the vertical scale is exaggerated. The horizontal arrow in section I. 
indicates the point at which the land-slide (p. 161) has taken place. 
an upright form, differing markedly in habit from that usually 
described in floras. This upright form has generally no procumbent 
branches whatever, but an uprising main stem, varying in height 
from 2\ feet to 4 feet. 1 The lower part of the main stem is mostly 
unbranched, while near the top numerous branches arise. Among 
the growth of low Calluna on the slopes of the valleys another 
form is found. In this case branching generally takes place freely 
from the base of the plant, the branches being for the most part 
procumbent. Occasional specimens, however, show one or more 
upright (or obliquely ascending) shoots, which grow to a height of 
l±-2^ feet; these upright shoots (generally bare below and well 
branched above) are quite similar in habit to the upright form found 
in the valleys, and are the only part of the plant that appears above 
the level of the surrounding heath-vegetation. 
As already indicated it is only occasional specimens of Ulex 
minor on the valley-slopes that show the upright shoots just 
described; a large number of specimens are entirely procumbent 
and of the type usually described in floras. In the zone of tall 
Calluna, found on die top of the central ridge, (cf. below, p. 152) the 
completely procumbent type is decidedly more prevalent than on 
1 The tallest specimen measured was 4 feet 2 inches high. 
