152 ON THE DUMETORLiM GROUP OF RLBI IN BRITAIN*. 



plant is so named; see Brit. Eub. p. 283. Mr. Bloxam labels 



specimens sent by me R. dumetorum, /3. tomentoms. 

 p. tube7'culattis Bab. = inter medius, ' Flora of Middlesex,' p. 100. 



Taking as my type of real tuberculatus ilie plant from Sheen 



Common, quoted as " Richmond " in ' British Eubi,' p. 283, and 



excluding the Thirsk plant, 

 y. pilosus, R. G. = Jiirtus, lAndX.Jide Baker. 

 S. diver sifoVms, Lindl. = diversifolius of Babington, ex parte, and 



Genevier, and nemorosus, 8. ferox* of Bloxam This often occurs 



as fusco-ater in old herbaria. 

 f . intensus = diversifolius, Bab. ex parte. 



a. concmnua 

 )3. tuberculatus 

 7. pilosus . . 

 S. diversifolius 

 e. intensus . . 



Attempt to co-ordinate the vieios of livuuj rubiologists. 



Kev. A. Bloxam. I Mons. Genevier. 

 nemorosus, /3. jdIIosus . corylifolius. 



Prof. Babiugton.t 

 tuberculatus . 

 tuberculatus . . 

 diversifolius . 

 diversifolius . 

 diversifolius . . 



tuberculatus 

 form of dumetorum 

 nemorosus, 5. ferox 

 diversifolius . . . 



views not known, 

 horrefactus ? 

 diversifolius. 

 horrefactus ? 



I have provisionally arranged dumetorum under these five varietal 

 letters, placing in order first coucinnus as nearest corylifolius. It 

 seems that concinnus, tuberculatus, pilosus, and diversifolius are good 

 and distinct Rubi forms, but intensus is merely intense diversifolius, 

 and hardly deserves a separate letter. I have no doubt that this group 

 will be hereafter increased by many other forms of fully as good varie- 



* The real dumetorum ferox of B,. G. should be ^searched for in Eng- 

 land. 



t The first question of any reader of this paper will be under what 

 heads in ' British Eubi ' of Professor Babington he is to look for the group 

 here described. The above are mere guesses as to which of Professor Babing- 

 ton's species my varieties fit best. But they are simply the best conclusions a 

 reader of that work is able to come to, and are very possibly erroneous, and 

 carry no kind of authority from the Professor himself. Mr. Bloxam's views, 

 however, I know pretty accurately, from the great personal assistance I liave 

 received from him. M. Genevier's verdicts are taken from his labels of 

 specimens in this group in Mr. Baker's possession. Mr. Baker's views are, I 

 may say, substantially mine; or, to put the case mor'5 justly, my views are de- 

 rived from Mr. Baker, without whose continual advice and assistance this 

 paper would never have been put together. I am indebted to him for sugges- 

 tions too numerous to particularize, and besides general corrections and super- 

 vision, many paragraphs are entirely due to him. To Mr. Bloxam I am also 

 indebted for very great assistance and repeated replies to letters on this sub- 

 ject, and for the loan of his excellent dried series of this group. To Eev. W. W. 

 Newbould I am grateful for great help in the collection and preparation of 

 specimens. 



