Book  (Sep 2007)  Page(s) 343-44.  
 
Rosa nutkana C. Presl subsp. macdougalii Shrubs taller, 1-3 m...fertile branches armed with straight or rarely curved prickles, or unarmed; sepal outer surfaces stipitate-glandular or eglandular; common at lower elevations...Fertile branches not dense, often with long internodes...commonly unarmed with with infrastipular prickles,; leaflets usually eglandular below and singly serrated without gland tips;...intermontane between the Cascade and Rocky Mts.
Other names:...(a long list, including) Rose brownii Rydberg.

Article (magazine)  (2007)  Page(s) 370, fig. 1.  
 
R. brownii typical ploidy 6x

Magazine  (1917)  Page(s) 70.  
 
In Notes on Rosaceae. Axel Rydberg: Rosa Brownii Rydberg
Stem...glabrous, green or brownish, armed with slend straight prickles...leaves five- to seven-foliate; stipules ovate, acute; petiole and rachis finely pilose (ed.: covered with soft, fine hair) and more or less glandular; leaflets thin...some of the teeth double...glabrate above, paler, pilose and slightly glandular-muricate beneath; flowers mostly solitary;...hypanthium globose...sepals...usually with foliaceous tips...petals broadly obovate, rose-colored...
This species resembles somewhat R. nutkana, but the prickles are weak, not at all flattened....Much of the Californian material determined as R. nutkana belongs here. California: North side of Mt. Shasta, 1897, H.E. Brown...Humboldt Bay, 1901, Chanlder...Mendecino (sic) 1903, McMurphy.