Book  (Apr 1993)  Page(s) 460.  
 
Poliarchus Shrub, cream flushed salmon, fading rapidly, Seedling x R. x Harisonii; Central Exp. Farm.

Magazine  (1960)  
 
Poliarchus. C.E.F. Ottawa. Open-fertilized seedling of R. x harisonii. A spreading shrub about 4 feet tall. Flowers are creamy-flushed-salmon and fade rapidly to cream. Flowers for two weeks in mid June.

Book  (1953)  Page(s) 67.  
 
[In the list of Hybrid Spinosissimas] Poliarchus - 28

Book  (Jan 1946)  Page(s) 33.  
 
Poliarchus. C.E.F. Ottawa. Open fertilized seedling of R. x Harisonii. A spreading shrub about four feet tall. Flowers are creamy-flushed-salmon and fade rapidly, on opening to cream. flowers for two weeks in mid June.

Book  (1946)  Page(s) 53.  
 
In "Progress in Breeding Hardy Roses," Isabella Preston says,

The well beloved yellow dooryard rose, Harison's Yellow, sets quantities of hips but the number of viable seeds they contain is very small. We have grown about fifteen seedlings of which three have been widely distributed and have proved their worth for cold districts. . . . Poliarchus grows into a large spreading mass about four feet high. The flowers are single pale pink fading rapidly to cream.

Book  (1940)  Page(s) 92.  
 
Open-pollinated seeds of R.Harisoni were sown, and some interesting seedlings were grown...Poliarchus (R.24.17.03) has single pale pink flowers which fade rapidly to cream. All of these are very hardy, and keep their foliage in good condition until late in the season.