Book  (1907)  Page(s) 117.  
 
1276. IVANHOE; P.
(1) 1899, Peter Barr & Son Cat.
(2) 1900, The Gardening World, Vol. 16, p. 709.
(3) 1906, Kelway's Cat., p. 109.

Magazine  (7 Jul 1900)  Page(s) 709-10.  
 
The Paeonies.
Messrs. Barr & Sons, King Street, Covent Garden, London, W.C., and Long Ditton, Surrey, as growers of hardy plants, &c., have over two acres devoted to them. On Staurday, June 23rd, notes were made of a number of fine varieties which they largely cultivate in their nursery at the address just given. 
Singles.—The singles are varieties of Paeonia albiflora...
Ivanhoe stands out conspicuously. It is a deep violet-purple, large and strong...

Website/Catalog  (1897)  Page(s) 22.  
 
New Single Herbaceous Pæonies for 1897 (Kelway's)
Ivanhoe, cherry