ON THE RUBI AND ROS^ OF THE CHANNEL ISLANDS. 85 



view that 330 ft. was more nearly correct, and considered that the 

 Centigrade scale of half a degree for 300 ft., which would represent 

 the slower rate of decrease, would give more correct results than 

 that of Fahrenheit ; but we now see that this would not be so. 



ON THE RUBI AND EOS^ OF THE CHANNEL ISLANDS, 

 By the Rev. W. Moyle Rogers, F.L.S., and F. A. Rogers. 



At the end of last June we spent ten days in Guernsey and a 

 week in Jersey. Unfortunately we were unable to visit Alderney ; 

 but we had a satisfactory day in Sark, under the guidance of Mr. 

 Derrick, the President of the Botanical Section of the Guernsey 

 Natural History Society. To him and to all the members of that 

 Society, and especially to its Secretary, Mr. Royle, we are greatly 

 indebted for advice and help ; as we are also to Mr. Lester, of 

 Jersey. Although we cannot of course flatter ourselves that we 

 have nearly mastered the Rubus and Rosa flora of the three islands 

 we visited, we venture to hope that this paper will contain a useful 

 contribution towards our knowledge of it ; and we hardly expect 

 that further research will add very greatly to the number of the 

 species now recorded. 



As may be gathered from the notes which follow, the genus 

 Rosa is very indifferently represented in the islands ; but the Rubi 

 are abundant and of considerable interest. Professor Babington's 

 PrimiticB FIovce Sarnicm was published in 1839, before he had given 

 any special study to the latter genus. Consequently we find him 

 crediting the islands with only four species, and it is probably 

 quite impossible now to ascertain what plants he referred to under 

 the names he gives. Two out of the four, viz. R. villicaulis and 

 R. Koehleri, we searched for in vain ; and his other two names, 

 R. rhamnifolms and R.fruticosus, are confessedly used in an aggre- 

 gate sense only. A few years ago, in a very hurried visit, the Rev. 

 Augustin Ley was able to record two species of great interest from 

 Jersey, R. Qiiestierii and R. Boraanus. And so the Rtibus list stood, 

 so far as we could ascertain, at the time of our visit last summer. 



We saw in all about thirty distinct forms, as named in the 

 following notes, besides five or six obscure ones which may prove 

 too strictly local to require naming. These last, with one exception 

 in Guernsey and one in Sark, occurred in Jersey, where, as might 

 be expected, the close alliance with British forms is less marked 

 than it is in the more western islands. In all the islands, however, 

 the vast majority of the brambles seen are practically identical with 

 our British forms. 



From Jersey we crossed to Brittany, and, after a few days at 

 Dinan, made our way through Normandy to Dieppe and Boulogne. 

 Our opportunities for studying the Rubi and Ros^ of N.W. France 

 did not prove good ; but we have been encouraged to believe that a 



