Book  (May 1998)  Page(s) 100-101.  Includes photo(s).
 
Rosa bifera alba ('White Four-Seasons Rose') Description... petals almost pure white, those at the centre cupped and crumpled, covering over the stamen rudiments... For a long while a rarity, this shrub is now found in almost all gardens. As in all Biferas, flowers appear early and again in the autumn, often up to the frosts, especially if during July one prunes and defoliates the shrub and waters during drought...

Book  (Jun 1992)  Page(s) 18.  
 
The pre-1811 white sport of 'Bifera'... rediscovered in South Africa.

Book  (1936)  Page(s) 77, 709.  
 
p. 77: Bifère à fleurs blanches (portland) ? ? ; white, slightly flesh-coloured when expanding, medium size, semi-double. = Perpétuelle blanche; Quatre saisons blanche.

p. 709: Tous mois blanc (damask) ? ? ; white, large, well double, flat, growth 7/10, upright, 1.50 m., hardy

Book  (1906)  Page(s) 161.  
 
10.125. Tous mois blanc, Damas, blanc

Book  (1899)  Page(s) 25.  
 
Bifère à fleurs blanches, Portland, blanc, syn. Perpétuelle bl.

Book  (1874)  Page(s) 135.  
 
NOMENCLATURE DES VARIÉTÉS MODERNES.
Rosiers mousseux remontants.
Quatre-Saisons blanche, fleur moyenne, blanche.

Book  (1858)  Page(s) 171.  
 
Rosa damascena bifera. Quatre Saisons blanc, medium size, double, white.

Magazine  (May 1850)  Page(s) 240.  
 
VINGT ET UNIÈME EXPOSITION de FLEURS, FRUITS ET LEGUMES, ET OBJETS D'ART ET D'INDUSTRIE HORTICOLES, les 16, 19 , 18 et 19 mai 1850, à l'orangerie du Luxembourg.... 
M. H. JAMAIN fils, horticulteur, rue du Cendrier, 5, cetrue du Marché-aux-Chevaux, 22. Perpétuelles.
1221 Quatre-saisons blanc.

Website/Catalog  (1848)  Page(s) 79.  
 
Perpetuals or hardy remontants...Des 4 saisons à fleurs blanches

Book  (1846)  Page(s) 113.  
 
Damask Perpetual. The White Damask Monthly, or Quatre Saisons blanc, is of a pearly white color at expansion, becoming perfectly white shortly after; the flowers, like the preceding [Quatre Saisons], are in clusters, and highly fragrant, and the genuine variety blooms quite as frequently. There are spurious varieties of both the red and the white flowering, which seldom bloom a second time.