RXTTTBTTTON MFETTNf;. 1 D52 
and size over a very small area (in this case about 10 yards). Typical 
material of the three varieties was exhibited: — var. cunum from Scout 
Scar, Westmorland, var. vineule from Cronkley Fell, Teesdale, and var. 
infi’rnipdivm from the Gower Peninsula, Glamorgan. The differences 
b('tweeu the varieties was mentioned (they are distinguished mainly by 
the differences in the hairiness of the leaves) and the sites at which they 
are found were pointed out. 
Several photographs of H. canum, (which is restricted to carbonifer- 
ous lime.stone) showed the inland and coastal habitat of the plant. 
Special attention was drawn to the history of H. canum; it has 
i-egularly been found in Late Glacial deposits (particularly in Denmark). 
Arfcmisia rampcfifrix L. and Ilippnphae rhamnoides L. are the other 
two characteristic species. All are intolerant of shade and disappeaied 
entirely with the coming of the birch in the Allerod Period. 
Evidence suggests that 11. canum could have survived the Glacial 
Period on nunataks in such regions as Teesdale (drift absent here) and 
PF.DICF.n 
SEP.VL 
PKT.4L 
STYLE 
Long whitish 
hairs at the base, 
glabrous towards 
apex. 
Yellow, varying 
in size, and with 
a red spot at the 
base. Entire or 
.lagged. 
Absent or veiy 
short. 
« 
Densely grey- 
tom entose. 
White, ovate. 
Filiform, straiglit 
or curved at the 
base then ascend- 
ing. Shorter than 
or equalling the 
stamens. 
chatnue- 
and 77. 
n the pedicel 
fleeted when 
d, straight- 
as the 
's open 
last for 
lay, opening 
the sun 
>, the petals 
g at night), 
mnng ca()- 
)oints up- 
, but when 
ieds are 
to be shed 
edicel be- 
deflected 
more. 
Pubescent, three 
prominent veins 
on the thi'ee 
inner sepals. 
Yellow, varying 
in size. More or 
less entii’e. 
Ditto. 
Ditto. 
Yellow, much 
smaller than in 
the other species, 
ovate. Entire or 
waved at the 
margins. 
Filiform, with a 
strong sigmoid 
curve in the 
middle, longer 
than the stamens. 
