192
SOUTH ESSEX BRAMBLES.
and very sparingly, R. dumnoniensis, Bab. forma. This latter
plant differs somewhat from the usual British form of this species.
It is a beautiful plant with a roundish, deeply cordate terminal
leaflet and bright pink flowers (in the type the flowers are milk-
white). Mr Rogers remarks that it is almost identical with a
form found growing by him in the Channel Islands at Sark and
Guernsey. Other brambles seen in this neighbourhood were :
R. rhamnifolius* Wh. and N., R. leucostachys, Schleich, and
R. leucostachys x rusticanus* in profusion, the hybrid
parentage of this being very well marked. Rubus fuscus
Wh. and N. var. nutans* Rogers, R. foliosus Wh. and N., and
R. rhamnifolius Wh. and N., grow on Coombe Green
Common. R. coesius, L., near Upminster Station; R. caesius
x rusticanus* towards Tylers Common; and along the same
road R. corylifolius, Sm. var. cyclophyllum (Lindeb.) The most
abundant brambles on Warley Common are R. selmeri,
Lindeb., and a form (or forms) which seems to connect R. nitidus
Wh. and N., with R. affinis Wh. and N., var. briggsianus Rogers,
and, perhaps, R. lentiginosus Lees. Further study is required
here, as this Warley Common form may cause the plant known
as R. affinis Wh. and N, var briggsianus, Rogers, to be
associated with R. nitidus Wh. and N., rather than with
R. affinis Wh. and N.; a result that would be in accordance
with the views of Dr. Focke.
Danbury Common : R. idaeus, L., R. nitidus,* Wh. and N.,
R. imbricatus Hort. var. londinensis* Rogers. This is
identical with the plant growing on the commons on the south-
western and south-eastern outskirts of the Metropolis, and dis-
tinguished as a new variety in the Journal of Botany, March,
1903. It is apparently very rare at Danbury. R. carpinifolius*
Wh. and N. (this also seems a rarity here), R. rhamnifolius,
Wh. and N., R. pulcherrimus, Neum., R. selmeri Lindeb. (by
the road from Bicknacre); R. rhombifolius,* Weihe. A
form or variety of this species growing abundantly here is very 
similar to a Surrey plant found by Major Wolley Dod, which
seems sufficiently distinct from the type to be regarded as an
undescribed variety. Further study is desirable. R. rusticanus
Merc., R. sprengelii* Weihe, R. pyramidalis,* Kalt. (a
small form identical with the Warley Common plant. A highly
glandular form * grows by the road from Bicknacre). R.