Book  (2000)  Page(s) 176.  
 
‘Constance’ = Hybride de Thé. Bien double et turbinée… éclôt jaune profond, et passe au jaune d’or avec l’âge… feuillage brillant, vert intense… élégant en massif… Pernet-Ducher, France, 1915.

Book  (Apr 1999)  Page(s) 461-462.  
 
Constance Pernetiana. Pernet-Ducher 1915. Seedling of 'Rayon d'Or'. The author cites information from different sources... Golden yellow... a step in advance toward the perfect yellow Rose...

Book  (Apr 1999)  Page(s) 559.  
 
Constance Pernetiana. Joseph Pernet-Ducher 1915

Book  (Apr 1993)  Page(s) 107.  
 
Constance Hybrid Tea, medium yellow, 1915, 'Rayon d'Or' x Seedling; Pernet-Ducher. Description.

Book  (1959)  Page(s) 53.  
 
At the top of his [Admiral Ward] list was the name of the greatest rosarian in the world, M. Pernet-Ducher of Lyons. From this unusual friendship came the introduction of such roses as Willowmere, named for Admiral Ward's beautiful home-place at Roslyn, Long Island. While Constance, a dazzling yellow, of similar type [as Willowmere] was named for the Admiral's little daughter who died in childhood.

Book  (1947)  Page(s) 126.  
 
Constance (Pernetiana) bears, upon a vigorous bush with glossy green foliage, full, double flowers with high centres of brilliant canary-yellow turning to golden-yellow. Pernet-Dcher 1915...Moderately fragrant...June-Sept. Hardy.

Magazine  (Dec 1939)  Page(s) 8.  
 
Quelques années plus tard, en 1915, le grand semeur lyonnais honorait à nouveau la famille Ward en dédiant une de ses plus belles roses jaunes à Constance, fille regrettée de l'Admiral et de Mrs. Aaron Ward.

Book  (1936)  Page(s) 169.  
 
Constance (hybrid lutea) Pernet-Ducher 1915; ? x Rayon d'Or; cadmium-yellow to golden-yellow, sometimes shaded orange and maroon-red, medium to large, double, flat cup form, orange buds, striped carmine, lasting, solitary, fragrance 4/10, mediocre, floriferous, continuous bloom, growth 7/10, upright, bushy, broad. Sangerhausen

Magazine  (Dec 1933)  Page(s) 102.  
 
Variétés de jardins. Rosiers Pernet ...Constance (Jos. PERNET-DUCHER, 1915) : fleur jaune de cadmium, passant au jaune d'or, grande, pleine, forme de coupe allongée, bouton allongé jaune orange rayé de carmin

Website/Catalog  (1929)  Page(s) 14.  
 
Everblooming Roses
The so-called Everblooming Roses include the Hybrid Tea and Pernetiana groups. They do not bloom all the time, but if kept healthy and growing steadily, one crop of flowers succeeds another at brief intervals.
Constance. Hybrid Tea. (Pernet-Ducher, 1915.) Orange buds, streaked crimson, and medium globular flowers of pure yellow which last well. Plant dwarfish and not reliably hardy.
Splendid yellow—once the best Rose of its color, and has few equals now. Good in favorable locations and with special care. Needs protection from black-spot. A good many people who discarded it once have come back to it because of the superior beauty of its flowers over more recent yellow sorts.