Article (misc)  (13 Dec 1968)  
 
Personal correspondence Percy Wright to Walter Schowalter :
This one is a Scotch rose of complex ancestry: Altaica x [(Macounii x acicularis) x Harison's Yellow]. I call it Harison's Hardy, and it is a bicolor, but both the pink and the yellow are weak, making it nearly white.

Book  (1967)  Page(s) 46.  
 
Some All-Canadian Roses
by Fred Blakeney, Victoria, B.C.
Mr. Percy Wright of Saskatoon, Sask., must be considered one of the foremost hybridizers of species and near species roses in North America. He has been working on these roses for many years, and knows the reactions of various hardy roses when crossed with species roses.
His objective has always been to produce worthwhile garden roses that are hardy enough to withstand the extremely low temperatures of the Prairies in winter. [...]
Here is a list of Mr. Wright's originations in chronological order of introduction:
1943 "Harison's Hardy", semi-double, flushed yellow at centre.

Website/Catalog  (1949)  Page(s) 7.  
 
Harison's Hardy - flower as double as Harison's Yellow, but only cream with tones of yellow in the centre. Completely hardy. Altaica by Harison's Yellow.

Book  (1947)  Page(s) 172.  
 
Percy H. Wright.  The Interactions of Various Rose Species.
Harison's Hardy - Resulting from pollen of Harison's Yellow placed on pistils of Rosa spinosissima altaica. The flower is similar to Harison's Yellow in doubleness and size, averaging slightly larger; color a deep cream in the center of the flower and pale cream at the outside. Foliage intermediate. Plant more erect than the pollen parent. Much hardier than Harison's Yellow; hardy to -60 F. Fertile.