252 DR. J. \V. HKSLOP HARRISON ON 



fresh specimens of undoubted 7?. tomeniosa gathered at 

 Lamesley, North Durham, wlien I was amazed to discover 

 that practically in every character, leaf shape, serration and 

 colour, flower colour, size and shape of fruit, colour of 

 bark,. and finally, habit of growth the two coincided ; whatever 

 differences were perceptible lay in tlie technical characters 

 employed to differentiate the section-species Afzelia/ue 

 (= cornfolia -\- glauca) from the ToiiienfoscE. Subsequent 

 investigations revealed that this microgene of the Afzeliance 

 abounded tliroughout the coast denes of Durliam, in the 

 hedges along the bridle path between Greatham and Cowpen, 

 and in North Yorks., and further that its latitude of variation 

 was much less than is common to most rose microgenes. The 

 next development occurred in late August of the same year 

 when a very similar clump of bushes was examined close to 

 Greatham village ; these bore fruit just changing colour and 

 were therefore determined without consideration as Rosa 

 frutetonvn. Imagine my dismay when, on making de- 

 tailed examination at home, I had to confess that the plant 

 appertained to R. glaitca. The tale did not end here. In the 

 following year, working in Hawthorn Dene (another of the 

 beautiful Durham coast ravines), I found a fourth rose, once 

 more referable to R. glajica, but in this case distinguished 

 from the form just described and the snr\.\\a.r R. f?-jitetonim and 

 R. toineutosa by its very conspicuous blue green, pruinose 

 leaves. Later, in the same expedition, I collected a 

 R. coriifolia variety of precisely the same type with leaves 

 covered with a waxy bloom, as well as a Rosa mollis very 

 close indeed to it. Next day I brought all these alongside 

 R. fnitetonim and R. toinentosa from Lamesley. In the 

 features referred to as linking R. friitetonim and R. tomentosa 

 together, save in the one point of leaf colour (and of course 

 in their special section characters), the agreement was com- 

 plete. 



To get parallel Eucaninc forms proved far from difficult, for 

 of the bushes growing along a disused waggon way at 

 Harrat(jn, N'oilii Durliani, more than 50 per cent, of the total. 



