Newsletter  (2018)  Page(s) 39. Vol 29, No 2.  
 
Vilhjálmur Lúðvíksson, Hardy Roses in Iceland. 
....does normally very well in Iceland as does 'Ristinummi', a probable natural spinosissima x rugosa cross named after the railway station where it was found. 

Article (magazine)  (Dec 2015)  Page(s) 21.  Includes photo(s).
 
”Ristinummi” (R. rugosa x spinosissima?) A rare find among rugosa hybrids, which may have originated in Russia. It was found growing along a railway embankment at Ristinummi Station, near Järvenpää, Southern Finland. “Ristinummi” forms a vigorous and rapidly spreading, healthy, erect thicket to 2,5 metres. The large, single flowers are a light shell-pink, yellowish near the centre. A moderate crop of dark red, rounded hips is usually set. The spinosissima influence confers a brick-red or wine-red autumn colouration of the foliage, and there is often a light repeat blooming in September.

Article (website)  (2005)  Page(s) 7.  Includes photo(s).
 
"Ristinummi" R. pimpinellifolia x rugosa ?