ON THE NECESSITY FOR A NEW MONOGRAPH OF ROSES 43 



(and somewhat rare) in certain of the southern counties of 

 England, while R. tomentella is rather widespread, and 

 appears to reach the south of Scotland. It has not been 

 noted from Ireland, but no doubt both it and obtusifolia 

 exist there. 



R. tomentella presents rather numerous varieties. Its 

 leaflets are rather often glandular below, but with the glands 

 odourless ; its pedicels, usually smooth, may be more or less 

 hispid-glandular. 



As in R. canina, the sepals remain reflexed after flower- 

 ing, which character in itself permits one to distinguish it 

 from varieties of R. coriifolia with compound glandular 

 teeth. 



On the Continent, varieties of R. dumetorum are 

 pretty frequently distributed under the name R. obtusifolia. 

 I believe that R. obtusifolia and R. tomentella may occur at 

 times with glabrous leaves. 



Rosa glauea, Vill. (including R. coriifolia, Fries). 



R. glauea is to R. coriifolia as R. canina (glabra) is to 

 R. dumetorum ; that is to say, R. coriifolia is the pubescent 

 state of R. glauea, as R. dumetorum is the pubescent state of 

 R. canina (glabra}. It follows that if one unites the two 

 latter as one species, it is equally necessary to unite the two 

 former under one specific name. 



English phytographers have not as yet accorded suffi- 

 cient importance to R. glauea, which they are accustomed to 

 rank among the varieties of R. canina. It deserves in 

 reality the rank of a subordinate species. It is a Rose of 

 the mountains, which, in Central Europe, rarely descends 

 into the plains. It is only in rather cold latitudes, towards 

 the north, that one sees it inhabiting the plains. It is 

 probable that in the British Islands it rarely occurs in the 

 plains in the southern districts, and that it is only towards 

 the north that one sees it at all common at low levels. 



R. glabra, in both its glabrous and pubescent states, pro- 

 duces varieties or forms parallel to those of R. canina. 

 Several of these forms have given rise to confusions with 

 not only R. canina and R. tomentella, but also R. tomentosa 



