Book  (1858)  Page(s) 193.  
 
Hybrid perpetual Perpetuelle Indigo, (Laffay), velvety dark violet.

Book  (1848)  Page(s) Vol II, p. 111.  
 
Damask Perpetuals. Indigo; flowers dark purple, occasionaly tinted with rosy crimson, large and double; form, expanded. Very distinct. Raised by M. Laffay of Bellevue.

Website/Catalog  (1846)  Page(s) 73.  
 
Rosiers hybrides remontants.
Perpétuelle indigo (Laffay), violet obscur velouté...3 fr.

Book  (1846)  Page(s) 111.  
 
Damask Perpetual. Indigo is a superb rose, of a dark rich violet hue, a new and desirable French variety.

Book  (1846)  Page(s) 138.  
 
Indigo...was raised from seed by M. Laffay. I have been quite at a loss to conceive how he could by any fair means imagine the colour of this rose to be indigo; he might certainly, with equal justice, have named it ultramarine, for it is as much like one as the other: in colour it is of a deep slaty purple; flowersm rather flat and not fully double.

Magazine  (Jul 1845)  Page(s) Advertising, p. 3.  
 
Laffay's New Roses
HOVEY &. CO.
Have the gratification of announcing that they have now ready for sale, fine plants of M. Laffay's splendid new Roses, which, like other seedlings of this eminent cultivator, are remarkable for their beauty. They were selected from M. Laffay's collection, last autumn, when some of them were seen in flower, and were the First plants which had been sold. They can all be recommended as worthy a place in every choice collection. The following are from the manuscript descriptions of M. Laffay :—
Perpetual Indigo (perpetual.) - Flower medium size, very double; color bluish violet, velvety, quite novel in tint ....$ 3 00

Magazine  (Jan 1845)  Page(s) 28.  
 
New Roses...of M. Laffay..from his manuscript catalogue which he gave us in Paris..: Perpetual Indigo...medium size, very double, flat, and of a very dark purple. This is one of the Portland or old perpetuals.

Magazine  (Dec 1844)  Page(s) 224.  
 
Roses Nouvelles obtenues de semis, par M. Laffay, rue du Bel-Air, à Bellevue, près Paris (chemin de fer rive gauche).
Hybrides perpétuelles.
Perpétuelle Indigo. Fleur moyenne, presque pleine, pétales imbriqués, violet noir velouté: 10 fr.