Book  (2007)  
 
'Buttercup' Hybrid Wichurana, medium yellow, W. Paul. Includes description.

Book  (Apr 1999)  Page(s) 558.  
 
Buttercup Multiflora. William Paul 1909

Website/Catalog  (1938)  Page(s) 11.  
 
Buttercup [Multiflora] (Paul & Son 09). Small flower, single, dark yellow bud, fading to yellow-white; buttercup-form; early.

Book  (1936)  Page(s) 117.  
 
Buttercup (multiflora) W. Paul 1909; buttercup-yellow, fades to paler, small to medium, single to semi-double, large clusters, free-blooming, no prickles, growth 8/10, climbing, 3 m. Sangerhausen

Magazine  (Jun 1929)  Page(s) 70.  
 
Multiflore sarmenteux ....Buttercup (G. Paul, 1907), fleur simple, jaune orangé en bouton, passant au jaune plus clair à l'épanouissement.

Magazine  (9 Oct 1909)  Page(s) 490.  
 
Buttercup, Mult., W. Paul and Son

Magazine  (29 May 1909)  Page(s) 272.  
 
The Temple Show....Messrs. Paul and Son, The Old Nurseries, Cheshunt, occupied their usual space in one corner of the large tent with a very beautiful and striking group of Roses in many types. Rambler Roses were finely shown, weeping standards standing out conspicuously. Hiawatha, Dorothy Perkins, White Dorothy, Lady Godiva and the new Rambler Buttercup were all charmingly displayed.