Website/Catalog  (1908)  Page(s) 3.  
 
DOUBLE HERBACEOUS PEONIES SERIES C. 50 cents each
Ambrose Verschaffelt, (Parmentler 1850) purplish crimson, fragrant and very full; one of the finest.

Book  (1907)  Page(s) 35.  
 
Ambroise Verchaffelt. Parmentier, 1850. Deep lilac crimson.

Ambroise Verchaffelt. Calot, 1868. Described by Ward: Deep purplish crimson; large, cup-shaped bloom; late. Fine for landscape work. Good for cut flowers. Not a success in the west.
 

Website/Catalog  (1907)  Page(s) 32.  
 
Herbaceous Peonias.
Select Double Peonias.
Ambrois Verschaffelt. — Dazzling red.  Very large flowers.  A free bloomer.

Website/Catalog  (1906)  Page(s) 3.  
 
Double Herbaceous Paeonies. Series C. 50 cents each.
Ambroise Verscheffelt, crimson purple, very full, fragrant.

Website/Catalog  (1901)  Page(s) 62.  
 
Pivoines herbacées
Prix: 25 variétés, 12 francs.
A notre choix exclusif, 100 plantes en 25 variétés, prix: 35 francs.
A. Verschaffelt (Calot).

Website/Catalog  (1884)  Page(s) 35.  
 
Herbaceous Hardy Chinese Paeonias.
1547 Ambroise Verschaffelt, rich glowing purple, rose-scented

Magazine  (3 Jul 1880)  Page(s) 5.  
 
Double-flowered Pæonies.
[...] Without making a long list of the best varieties we append an enumeration of a few of the most distinct.  [...]
Of crimsons—Ambroise Verschaffelt, Henry Demay, Souvenir d'Auguste Miellez, Victoire d'Alma, and Augustin Dhour.
[...] All the above grow to much the same height, about 3 feet, and thrive well in any ordinary garden soil.

Magazine  (9 Sep 1876)  Page(s) 259.  
 
Select Pyrethrums, Pæonias, Potentillas, Irises, and Phloxes.
Pæonias, varieties of sinensis. — Ambroise Verschaffelt, brilliant reddish-purple...