163 
9. Rosa arvensis, Huds. Probably the most common Rose of Hereford- 
shire, next after R. canina; and certainly the most abundant. It is curious to 
notice how much less subject to variation this ubiquitous plant is than 2. canina. 
It is among the least liable to multiformity of any British Roses. Throughout 
the county it is almost uniform. 
The Var. b. bibracteata I have never succeeded in finding in Hereford- 
shire; but a curious state, which I have not seen noticed in books, is sometimes 
found, in which the sepals turn up and are persistent, much after the manner of 
the Sub-cristate varieties of R. canina. 
I wish to record, in conclusion, my obligations to Mr. J. G. Baker, of Kew, 
to whose judgment county specimens of nearly every variety mentioned in the 
foregoing paper have been submitted. If my personal obligations, and I may 
add our county obligations, to this gentleman’s courtesy have been great, the 
obligations of every student of Wild Roses, to his admirable Monograph, are still 
greater. Without it, no botanist could now hope to work successfully in this 
genus. To say that it is not perfect, is only to say that the knowledge of British 
Roses has (almost entirely through its means) progressed since 1869, when it was 
published—a statement which Mr. Baker himself would be the first to acknow- 
ledge. Criticisms of different details in its divisions would be, no doubt, easy ; 
and some such have been suggested in the foregoing pages. Still the Monograph 
as a whole is admirable ; and it is only on the basis of the knowledge furnished by 
the Monograph itself that such details of criticism could be based. 
