NOTES ON RUBI SUBERECTI 281 



in Mr. Rogers's Handbook resemble each other : another item in 

 the evidence in favour of the supposition that there may be 

 closer relationship between the two than is usually suspected, 

 or that suherectus x corylifolius has been taken for fissus. The 

 terminal leaflet of B. c. var. suhlustris is often divided into two 

 or three. 



RuBus suBERECTUS Andcrsou. I have not met with this plant 

 on the Kentish side of Tunbridge Wells, but have found it scat- 

 tered thinly about damp w^oods in East Sussex and North-east 

 Surrey. I believe I have found hybrids of it with carpinifolms, 

 argenteus, corylifolius, and Balfouriamcs, where these have grown 

 close to it. It is variable, and in the National Herbaria much 

 confused with other Stiberecti ; but its sparse small prickles, 

 especially on the panicles which are simple or nearly so, its very 

 green sepals, its suckers, and flowering earlier than the other 

 Sitberecti are sufficiently distinctive. In the Surrey wood at Ling- 

 field and Dormans B. sidcatus grows with it ; B. Bogersii occurs 

 on the railway bank at the edge of the wood. There is no plicattis 

 novfiss2ts near by : I have carefully searched the spot and examined 

 the Rubi there about thirty times in the last nine years. Any one, 

 I think, seeing the plants there would be struck with the obviously 

 close relationship between Bogersii and the suberectus near by in 

 the same wood. 



RuBus RoGERSii Linton. Within my experience B. Bogersii 

 occurs near Tunbridge Wells as a single bush seldom met with — 

 once in a wood in conjunction with B. suberecttcs and B. sulcatus 

 in Surrey, and once on our Common, where plicatus is abundant. 

 These facts, combined with its own features and with the marked 

 differences there are between the specimens in our National 

 Herbaria, make me suspect that it may be really a hybrid with 

 B. carpinifoliics near by, or confused with it by some observers. 

 In October, 1907, there were eight specimens in the British 

 Museum : on a critical examination I found they included four 

 quite distinct forms, combining in different w^ays pUcatus and 

 carpinifolius. On Ohislehurst Common, where carpinifolius and 

 fissus meet, I found, in 1910, plants very closely resembling 

 Bogersii (short-stamened plicatus is there also, and apparently 

 " intermediate" plants). I have a Scotch specimen of B. Bogersii, 

 kindly given me by Mr. Rogers ; except in being smaller, this is 

 exactly like another Scotch one I have, which he labelled " un- 

 doubtedly strong yissws." B. Bogersii is held by Dr. Focke to be 

 identical with his B. ammobius, which is considered by Nyman as 

 a hybrid of plicatus. Again, it has been often confused with Dr. 

 Focke's opacus, but opacus is itself thought to be a hybrid of 

 plicatus. Quite close to Bogersii I have found what appeared to 

 me probably a hybrid of it with rusticauuSy and another with 

 corylifolius. The impression left on my mind is that B. Bogersii 

 is a hybrid of B. carpinifolius with suberectus or plicatus, and that 

 forms of plicatus are also apt to be confused with it. 



RuBUS SULCATUS Vcst. I havc had particularly favourable 

 Journal of Botany. — Vol. 50. [Sept. 1912.] x 



