Book  (Apr 2001)  Page(s) 94.  
 
Walter Butt (R. x micrugosa 'Walter Butt') Hybrid Rugosa. Strassburg Bot. Gar. 1905

Book  (1996)  Page(s) 88.  
 
R. x micrugosa 'Walter Butt' R. roxburghii x R. rugosa or vice versa. The rose was found 1905 in the Botanical Garden of Strasbourg. Single, large, pink, reddish prickly persistent fruit. Foliage is similar to R. rugosa in colour and firmness, but R. roxburghii in the number of leaflets. Vigorous, upright, prickly canes.