Website/Catalog  (1910)  Page(s) 11.  
 
Single Herbaceous Peonies
10—Herculeus. Rosy pink; fragrant; mid-season...35¢

Book  (1907)  Page(s) 107.  
 
1153. HERCULEUS; P...
(1) 1884, The Florist, p. 110.

Website/Catalog  (1892)  Page(s) 16.  
 
Peonies.
Single Varieties.
Herculeus.—A novelty in every sense of the word. It is a strong growing plant, and produces the most beautiful flowers imaginable. Color at the centre is a snow white, while the edges are a bright rosy pink. 75¢ each.

Website/Catalog  (1890)  Page(s) 28.  
 
Single Herbaceous Pæonies.
Herculeus, rosy pink, white centre. [K]

Magazine  (Jul 1884)  Page(s) 110.  
 
Register of Novelties.
New Flowers.
Pæonies, Single Herbaceous.—The following varieties raised by Messrs. Kelway & Son are now being offered:
Herculeus, rosy pink, white centre...