•I'HK (IKNUS ROSA 253 



and at least 90 per cent, of the Eticaniiice, belonged to a niicro- 

 gene R. flexibilis simulating the green R. glauca discussed 

 previously, whilst a much smaller number were of the related 

 blue-green glabrous and blue-green hairy types. Thus, to all 

 intents and purposes, I had traced the passage of microgenes 

 of like type to ihe/ndefon/m through all the section-species 

 except the Rubiginosce and Agrestes. With the former section 

 I have never made the link, simply because it is only a 

 denizen in our counties, -whilst with the latter the connection 

 came later when I recognised that the microgenes regarded as 

 glandular Eticaiiiiice. were actually Agrestes. Rosa vinacea 

 then fell into its natural place as an Agrestes representative 

 of the fnitetorum — tomentosa— flexibilis alliance to which I 

 apply the name ■" species-type."* 



By similar stages other linked species-types were discerned, 

 although not every one was recognised in all the sections. 

 For instance, whilst ^e liitetiana — durnetorum fraternity had 

 yielded all four possible combinations in the Evcaniiice and 

 Afzeliauce, only certain Tomentosx provisionally named by me 

 R. pseudo-cuspidata went with them— and so with others. 



In all I determined seventeen definite species-types 

 occurring in three or more groups, with a less number repre- 

 sented in two only, all of the section-species being involved 

 except the Rubiginosce, The members of that section, for 

 reasons already stated, could not with certainty be attached 

 to any forms occurring locally. Recently, however, I have 

 received a number of Norwegian roses from Traaen which 

 included a ^/flr//^a form determined by him as Rosa Traaeni 

 Almquist. 'Yo Xk\\^ \\\^ Riibigiiwsaioxxn R. Li7ito!ii'\, vih'xch is 

 common iiereabouts, and the Eucanine R. sylvulariim present 



* A species-type may be defined as the model of a group of microgenes 

 ot similar facies, with representatives, in eacli section, possessing the 

 characters proper to tliat section added to those peculiar to the species- 

 type. 



t This is, of course, the glandular R. coriijvlia var. Lintoni of British 

 authors. 



