78 RARER FORMS OF RUBUS LATETY FOUND IN DORSET. 



Riibus melanodermis, Focke. In 1886 the Rev. W. M. Rogers 

 observed a bramble new to him growing abundantly on Puddletown 

 Heath, and between Rampisham and Evershot, in this county. 

 This was subsequently determined by Prof. Babington 

 to be R. melanoxylon, Miill et Wirtg. Dr. Focke has since pointed 

 out that this is not the case, and in May, 1890, he described it as 

 a new species under the name of R. melanodermis. He adds, 

 however, that it may possibly be a variety of the species to which 

 Babington has ascribed it. However this may be, it is one of our 

 most marked brambles in South Dorset, extending from its original 

 station westwards to Bournemouth, and for some distance into Hants. 

 It is often abundant. I have it from near Wool, Wareham, 

 Bailie Gate, Studland, and Branksome. Babington places it under 

 the Koelileriani ; but this hardly seems to be its right place. I 

 think it has affinities with several other species e.g., R. Bloxamii, 

 and perhaps R. infestus. One of its most marked features consists 

 in the shape of the terminal leaflet, which ends in an abrupt 

 cuspidate point. I have seen nothing quite like this in any other 

 bramble with which I am acquainted. 



Rubus plintliostylus, Genev. This form was added to the British 

 lists in 1887 by Prof. Babington on the strength of specimens 

 collected by the Rev. W. Moyle Rogers in Minster Valley, E. 

 Cornwall, in June, 1886. These specimens (some of which I have 

 seen in Mr. Rogers' herbarium) are very immature, but Prof. 

 Babington seems to have had no hesitation in assigning them to 

 Genevier's plant. Since then nothing more had been heard of 

 the plant in Britain until in November last I submitted to Prof. 

 Babington a bramble which I had collected in the previous August 

 in Foxholes Wood, near Bailie Gate, and in hedges by the side of 

 the road from Bailie Gate to Hamworthy. I had supposed it to 

 belong to R. Koehleri, though not quite agreeing with any of the 

 named forms. The Professor, after a careful comparison with 

 Genevier's original specimens (now in the Cambridge Herbarium) 

 referred it to R. plintliostylus a determination with which M. 

 Rogers, to whom I afterwards showed the plant, is disposed to 



