76 RARER FORMS OF RUBUS LATELY FOUND IN DORSET. 



Rubus dumnoniensis, Bab. This species was founded by Professor 

 Babington in the "Journal of Botany" for November last (1890) 

 in order to receive a plant from the neighbourhood of Plymouth, 

 which had previously been assigned to R. incurvatus. Focke 

 thinks that it may be the same as the R. rotundatus of P. J. Miiller, 

 but will not speak decisively. He says : " It is near R. incurvatus, 

 which may be, however, distinguished by its shorter prickles, 

 smaller pink flowers, and long narrow panicle." R. dumnoniensis 

 has large white petals and long slender prickles, reminding one of 

 those of R. affinis. It has been recorded from near the Lizard, 

 Cornwall (Focke) ; about Plymouth (Briggs and Focke) ; S. Hants 

 (Briggs) ; Derbyshire (Rev. "W. R. Linton). I have myself seen it 

 about Bournemouth (Hants) and between Sturminster Newton and 

 Fifehead Neville (Dorset), in both which places it was pointed out 

 to me by the Rev. W. R. Moyle Rogers. 



Rubus leucandrus, Focke. For such knowledge as I possess of 

 this form I am indebted to Mr. Rogers. The species was described 

 by Focke in 1875 from N.W. German specimens. It is nearly 

 related to R. villicauUs, from which it differs by its smaller 

 prickles, its leaflets strongly acuminate, and its panicle leafless in 

 the upper part. The last character does not, I think, always 

 hold good. Dr. Focke saw the plant near West Moors and Daggons 

 in this county, and I have myself seen it in Piddle Wood, Stur- 

 minster Newton ; in a rough field near Dullar Wood, both in this 

 county ; and in Bournemouth (Hants). 



Rubus Mrtifolius, Kalt. This grows abundantly in Bere Wood, 

 where I gathered it for the first time in August, 1885. It is a 

 striking plant, and when well developed can hardly be mistaken. 

 But it is apt to shade off in the direction of R. leucandrus, and 

 possibly these two may prove eventually to be the extremes of one 

 species. This idea has been suggested to me partly by the 

 examination of specimens in Mr. Rogers' herbarium, and partly by 

 the fact that Dr. Focke, who named the Bere Wood plant R> 

 hirtifolius, remarked that it was the same as another which I had 

 sent to him under that name. This referred to a Plymouth plant 



