1 6 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
Common, 14th July 1904; Streatham Common, 26th July 1904; 
Ockham Common, ist Aug. 1904. All Surrey localities. It will be 
seen from the preceding list of localities that this form of R. im- 
bricatus, Hort, (provisionally separated by the Rev. W. Moyle Rogers 
in his article on the “ Rubi of the neighbourhood of London ” 
in the Journ. of Bot. 1903, as var. londinensis)^ is a frequent plant 
in N.E. Surrey, where, upon the gravelly and sandy commons, 
it appears to be the only form representing R. imbricatus, Hort. 
It does not appear to exhibit much variation ; the long prickles 
of the stem, the beautifully cuspidate leaflets, and bright rose- 
coloured petals being constant features. Of the specimens I send, 
the more luxuriant ones, from Westend Common, Esher, and 
Ockham Common, are from boggy situations. Outside Surrey, 
I have gathered this variety on Blackheath. W. Rent, and on 
Danbury Common, S. Essex. — C. E. Britton. “ Beautiful and 
most characteristic specimens of my variety from all these localities. 
Strongly marked as are the features in which this plant usually 
differs from typical R. imbricatus, Hort, I have seen them so 
far modified in a few bushes (on Barnes Common at all events) 
as to justify its retention as a variety of that species. To some 
extent perhaps it may be said to go off from it towards R. tiemoralis, 
P. J- Muell., while its peculiar prickles recall those of R. aj/itiis, 
Wh. and N., and R. dumnoniensis, Bab.” — W. Moyle Rogers. 
R. erythrifius, Genev. Near Danby Lodge, Dean Forest, 12th 
Aug. 1904. — Augustin Ley. “This wilt in future be called R. 
argenteiis^ Wh. & N. See Journ. Bot. 1905, p. 20c.” — W. Moyle 
Rogers. 
R. durescens, W. R. Linton. Near Mugginton, Derby, 6th 
Aug. 1904. — W. R. Linton. 
R. /icmoralis, P. J. Muell., var. Silurum, A. Ley. Mitcheldean 
Meend, W. Glos., i8th Aug. 1904. — Augustin Ley. 
R. dumnoniefisis, Bab. West Cornwall, 1904 : Lizard Down, 
in great quantity, very strong and characteristic, July 16; Housel 
Bay, Lizard, July 27 ; Mullion Cove, August i. One of the most 
abundant and easily recognized brambles of the Lizard district, 
extending across the peninsula to within a stone’s throw of the sea. 
Though usually quite typical, the Housel Bay plants have some 
of their leaves abnormally incised-lobale. — W. Moyle Rogers. 
R. mercicusy Bagnall, var. bracteatus, Bagnall. Hartshill, War- 
wicksh., i6th July 190I. — J. E. Bagnall. 
R. villicaulis, Koehl., var. Selmeri (Lindeb.) Castle Biom- 
wich, Warwicksh., July 1904.— J. E. Bagnall. Wyre Forest, 
Salop, 25th Aug. 1904.— Augustin Ley. 
