Website/Catalog  (1949)  
 
"ROSA MACOUNII - one of our native rose species, with round, orange-colored hips. I selected a strain with extra deep pink flowers, single, of course."

Percy Wright Catalogue - Hardy and Semi-Hardy Roses - ca 1949 p.4

Article (magazine)  (1934)  Page(s) 227.  
 
R. blanda also gives fertile vigorous hybrids with the diploid R. woodsii. An intergrading series between these forms makes it hard to classify the diploid roses of the northern Great Plains region. In herbaria these forms are usually called R. macounii, a species that is probably a definite ecotype of R. woodsii. Lunell's description of R. naiadum Lunell covers this hybrid, which resembles R. woodsii and may be used to designate intermediate forms.

Book  (1906)  Page(s) 190, 191.  
 
p. 190
10. R. Macounii
Infrastipular present. Hypanthium and fruit glabrous. Leaflets glabrous or nearly so. Spines straight or nearly so.
p. 191
9. Rosa Macounii Greene. In valleys and along streams from S.D. and Alb. to Kans. and Colo.—Colorado Springs; Pike's Peak; Mancos; New Windsor; North Cheyenne Cañon, west of Ouray; Dix Post Office; Four-Mile Hill, Routt Co.; Parlin.