Article (magazine)  (2023)  
 
‘Agnes’ has a citrus-like green scent, and almost no R. foetida-like unpleasant odor in its flowers. The major scent components are caryophyllene and α-farnesene. Caryophyllene is thought to be inherited from R. foetida f. persiana and α-farnesene is thought to be inherited from R. rugosa. Fatty acid derivatives, the characteristic scent components of R. foetida were not detected in this cultivar.

Book  (Feb 2009)  Page(s) 232, 233(photo).  Includes photo(s).
 
‘Agnès’: Rosiers rugueux. Adaptation aux climats marins. Parents: Rosa rugosa x Rosa foetida. Obtenteur: Saunder 1900. En principe non remontant, il peut, lorsqu’il est bien installé, offrir des remontées sporadiques. Description..

Article (misc)  (2005)  Page(s) 111, Table 5-1.  
 
Agnes : Pentaploid

Book  (2004)  Page(s) 186.  Includes photo(s).
 
‘Agnes’. Hybrid rugosa. This rose is best described as amber, although in certain weather the blooms can take on hints of pink, as seen in the picture. The flowers are large, double and nicely scented and come in small clusters. Foliage is rich green, glossy and quilted on a vigorous, healthy bush. It is once-flowering only but occasionally produces another flower or two through the season. It was bred by Saunders of Canada and introduced in 1900. (Rosa rugosa x R. foetida perseana). RHS Award of Garden Merit. 2001. Zones 4-9.

Book  (2002)  Page(s) 18.  
 
Rated 7.8

Book  (2000)  Page(s) 67.  Includes photo(s).
 
‘Agnès’: Hybride de Rugosa - jaune pâle. Il existe peu de rosiers rugueux jaunes, et moins encore de remarquables, mais celui-ci est une réussite. …feuillage, typique du groupe, et vert franc et plissé. C’est un rosier vigoureux qui ne fleurit en principe qu’une fois en mai-juin, mais qu’un bel automne peut fort bien inciter à refleurir. Saunders, Canada, 1900. Rosa rugosa x Rosa foetida persiana.

Website/Catalog  (4 Jan 1999)  Page(s) 128.  Includes photo(s).
 
Agnes Description... the best yellow Rugosa for blossom count, form, fragrance, and hardiness...

Book  (Dec 1998)  Page(s) 67.  Includes photo(s).
 
Agnes Hybrid Rugosa. Saunders 1900. Description... The large double blooms are a pale amber with a deeper center... in warm autumns there will be a second crop of color...

Book  (1997)  Page(s) 225, 226.  Includes photo(s).
 
p. 225: Agnes Rugosa. Saunders Central Experimental Farm (Canada) 1922. Parentage: R. rugosa x R. foetida persiana. Description and cultivation... one of the few yellows of this group... repeats intermittently...
p. 226: [Photo]

Book  (Mar 1995)  Page(s) 149.  Includes photo(s).
 
Agnes Hybrid Rugosa. Saunders (Canada) 1900. Description... the first yellow rugosa...