Website/Catalog  (2008)  Includes photo(s).
 
Check the New York Botanical Garden website for an outstanding large, pressed specimen of Rosa rousseauiorum Boivin.

Website/Catalog  (2006)  Page(s) 41.  

Article (magazine)  (2005)  Page(s) 396.  
 
Our data suggest that R. rousseauiorum and R. williamsii cannot be considered as species distinct from R. blanda. Here we consider species to be ecologically, morphologically and (or) genetically cohesive groups of populations that evolve independently from other such groups. [Our analysis] suggests most of the genetic variation occurs within rather than among R. blanda segregates. ...Despite intensive collecting in the regions where R. rousseauiorum and R. williamsii are endemic, few specimens could be unambiguously identified as belonging to either of those two taxa. Doubts have long persisted in the botanical community regarding the species status of R. rouseauiorum and R. williamsii, as well as that of R. johannensis and R. sublanda. ...[they track all the botanical discussions]

R. rousseauiorum and R. williamsii are distinguished from R. blanda by the presence of a large number of glandular trichomes on the lower surface of the stipules.....Although our sampling for these other taxa [ R. johannensis and R. subblanda] is limited, our survey of molecular markers in specimens from Quebec strongly suggests that on both molecular and morphological grounds, R. blanda should not be subdivided into several different species. "

Book  (1990)  Page(s) 26.  Includes photo(s).

Book  (1988)  Page(s) 156.  
 
location 112/1+3, R. johannensis Fernald, CINNAMOMEAE, eastern North America, violet-soft pink, single, medium size, cluster-flowered, floriferous, late-blooming, upright, branched, 1.8- 2 m, many suckers, many bristles, medium green medium size matte-glossy large foliage, 5-7 leaflets, orange-red small oval to bottle-shaped glossy fruit, upright extended elongated persistent sepals, fall off complete, many hips

Book  (1988)  Page(s) 136.  
 
location 134/1, 146/7, 147/2; R. blanda Aiton var. glabra Crép., deep pink, lightens somewhat, single, fragrant, medium size, solitary or cluster-flowered, floriferous, early-blooming, bushy, upright, branched-arching, 1.5-2.5 m, bristles, few prickles, dark green medium-large matte foliage, 5-7 leaflets, orange-red matte-glossy small rounded to urn-shaped fruit, upright extended elongated persistent sepals, fall off complete, moderate amount of hips

Book  (1984)  Page(s) 100.  
 
Rosa blanda ‘Glabra’ /Rosa blanda var glabra = Se distingue par des feuilles entièrement lisses.

Magazine  (Jun 1948)  Page(s) vol. 50, no. 594, pp. 145-147.  
 
SOME MINOR FORMS OF ROSA
M. L. Fernald
One of the most remarkable of roses only recently described is Rosa Rousseauiorum Boivin in Naturaliste Canadien, lxxii. 225 (1945), the third very characteristic species endemic to the area centering on the lower River and the Gulf of St. Lawrence, the new one strongly marked by its very large and dilated stipules (2-3.5 cm. long) bordered by crowded red stipitate glands so that the teeth often appear glandular-pectinate, the sepals 1.8-2.5 cm. long. The earliest collections cited for this endemic of the lower St. Lawrence were made in 1927. It is, therefore, worth noting that among the accumulation of "unidentified" roses in the Gray Herbarium there is a very characteristic specimen from "Canada, Herb. Shepard'', with Crépin's note ''R. blanda Ait. var. à dents composées-glanduleuses''. What Crépin could not have known from this very old specimen (just in bud) is the fact that in maturity the sepals would have become reflexed against the fruit, the very striking character which distinguishes this species, R. Williamsii Fernald and R. johannensis Fernald from R. blanda, in which the sepals form a porrect beak at summit of the fruit. Since this specimen came from "Herb. Shepard'' it is probable that John Shepard received it from Frederic Pursh, who explored the lower St. Lawrence.

Book  (1937)  Page(s) 72.  
 
Johannensis Fernald (blanda-race)

Book  (1876)  Page(s) fasc. 4, p. 394.  
 
Rosa blanda Ait. Hort. Kew., ed. 1, II, p. 202...

Var. β.  glabra (R. blanda Ait. et Jacq., R. fraxinifolia Gmel.). Folioles glabres en dessous; tige inerme dans sa partie supérieure; branches et ramuscules florifères inermes ou presque inermes.