Book  (1907)  Page(s) 114.  
 
1249. IMPERIAL, PRINCE; P....(Calot, 1859)
(1) 1859, Dessert's MSS.
(2) 1906, Cottage Gardens' Cat.
(3) Cornell Plots Nos. 797, 798, 799, 800, 801.

Book  (1907)  Page(s) 26.  
 
Here is my list of the best 24 varieties of peonies for cut flowers: Baroness Schroeder, Festiva Maxima, Golden Harvest, Madam de Verneville, Duke of Dorchester, Belle de Nancy, Mt. Blanc, Couronne d'Or, Pottsii Alba, Livingstone, M. Geissler, Madame Emil Lemoine, Floral Treasure, Richardson's Grandiflora, Richardson's Rubra Superba, La Tulipe, Marie Crousse, Modeste Guerin, Marie Lemoine, Mons. Dupont, Prince Imperial, Sunbeam, Louis Van Houtte, L'Esperence.
C. S. Harrison.

Book  (1907)  Page(s) 46.  
 
Prince Imperial. Calot, 1859. Late mid-season. Very strong stem, surmounted by brilliant, purplish scarlet bloom. Fine for cut liowers and very effective in outside ornamentation. Should be in every collection.

Website/Catalog  (1895)  Page(s) 23.  
 
Barr's Hardy Double Chinese Pæonies.
Very Deep Crimsons. (Mostly rose-scented, all beautiful.)
Prince Imperial, deep carmine, tipped purple, 3/6.

Website/Catalog  (1888)  Page(s) 28.  
 
HERBACEOUS HARDY JUNE-FLOWERING CHINESE DOUBLE PAEONIAS. VARIETIES OF ALBIFLORA.
Prince Imperial, rich crimson-carmine, fragrant, 3s. 6 d.