43. R. c^sius. 293 



found much difficulty in doing so, but it is to be expected 

 that many intermediate forms should occur. 



Considered as a whole R. ccesius seems to be a tolerably 

 well-marked species. It is variable, and its extremes diffei- 

 considerably; but probably no botanist who has paid much 

 attention to brambles will have any doubts concerning its 

 forming only one species. 



Habitat. — Fields, hedges and heaths. June, July. 



Area.— I 2 3 4 5 6 7 8 . 10 11 . 13 U .... 19 

 20 ... 24 . 26 27 28 . 30. 



It is probable that all the other provinces produce this 

 plant. Mr Watson adds doubtfully 9, 12, and certainly 

 15, to the numerical list of those of the correctness of which 

 I have had personal proof. It will be seen that we have no 

 record of Ii. ccesius from the north of Scotland, and that 

 several of the Irish Provinces are not as yet known to pro- 

 duce it. It is not thought necessary to give exact localities 

 for so common a plant. 



