Article (magazine)  (1 Feb 1898)  Page(s) 22.  
 
[From a talk by Léon Chénault at the Conference of Rosarians at Orléans, published in "Journal des Roses"]
Baron de Bonstetten (Liabaud, 1872), est identique à Monsieur Boncenne du même obtenteur en 1865.

Translation:
Baron de Bonstetten (Liabaud, 1872), is identical to Monsieur Boncenne of the same breeder in 1865.
 

Magazine  (1896)  Page(s) 80.  
 
Similar roses. These are not exactly synonyms, but are equal in the most points...
Mr. Boncenne, Perpetual, Liabaud, 64, Baron de Bonstetten, Liabaud, 72

Book  (1895)  Page(s) 110.  
 
Monsieur Boncenne (syn. Baron Bonstetten), blackish purple

Book  (1895)  Page(s) 731.  
 
SYNONYMS OF GARDEN ROSES-The following Roses bracketed together have been regarded as synonymous according to the rule adopted by the National Rose Society:
(Monsieur Boncenne
(Baron de Bonstettin

Website/Catalog  (1894)  Page(s) 179.  
 
Hybrid Perpetual Roses.
Monsieur Boncenne  Violet crimson, richly shaded, large and full. 

Magazine  (1889)  Page(s) 283.  
 
The following Roses bracketed together have been regarded as synonymous, according to the rule adopted by the National Rose Society; and the name standing first in each case, being believed to be the original name, is considered for the purpose of the preceding Digest as the ruling name of the Rose.
(Monsieur Boncenne
(Baron de Bonstettin

Magazine  (1 Apr 1883)  Page(s) 58.  
 
Les Rosiers Types by H.B. Ellwanger, Horticulteur à Rochester (États-Unis).
...Type Monsieur Boncenne. — Ce type, introduit en 1864 par Liabaud, nous donne les roses les plus foncées que nous ayons. D'après l'apparence, nous croyons qu'il vient d'une fécondation naturelle entre des variétés des types Géant des Batailles et Général Jacqueminot. Bois vert foncé, peu d'épines, longues pousses. Peu florifère à l'automne, fournit les plus belles roses rouge foncé, veloutées au printemps.
Les descendants sont: Baron Chaurand, Baron de Bonstetten. Abel Carrière, Henry Bennett, Jean Cherpin, Jean Liabaud, Jean Soupert, Président Léon de Saint-Jean.

Translation: The Rose Types by H.B. Ellwanger, horticulturalist at Rochester (United States).
Monsieur Boncenne Type. -- This type, introduced in 1864 by Liabaud gives us the darkest roses we have had. From its appearance, we believe that it comes from a natural fertilization between varieties of the Géant des Batailles and Général Jacqueminot types. Wood is dark green with few thorns and long shoots. Not floriferous in autumn, provides the most beautiful velvety dark red roses in spring.
The descendants are: Baron Chaurand, Baron de Bonstetten. Abel Carrière, Henry Bennett, Jean Cherpin, Jean Liabaud, Jean Soupert, Président Léon de Saint-Jean.

Website/Catalog  (1883)  Page(s) 124.  
 
Mons. Boncenne. Very dark crimson.

Book  (1874)  Page(s) 213.  
 
However, supposing we are as near black as to blue, the following list will serve to indicate the best of the blackest roses: Baron Chauraud, scarlet with blackish centre; Black Prince, well named, crimson shading to purplish black; Cardinal Patrizzi, crimson shading to black; Louis Van Houtte, red shading to blackish crimson and purple—this ought, perhaps, to be in the list of blues— Monsieur Boncenne, blackish purple; Souvenir de William Wood, the blackest of the black, a fine rose, with rich shadings of red and purple; Xavier Olibo, velvety black shaded with fiery red.

Magazine  (29 Nov 1864)  Page(s) 426.  
 
The New Roses....Liabaud. Monsieur Boncenne.- Very vigorous. Flowers large, cup-shaped, blackish velvety purple.