Book  (1907)  Page(s) 43.  
 
Louis Van Houtte. There are three bearing this name; one by Delache, 1854, even, bright, violaceous red; one by Parmentier, 1850, soft pink, deeper center. The one generally grown is probably from Calot, 1867. Rich color, glaring purplish pink. Very satisfactory.

Website/Catalog  (1876)  Page(s) 347.  
 
Pæoniæ Herbaceæ.
Pivoines Herbacées.—Staudenartige Pæonien.
512. Louis Van Houtte (Delache). Rouge pourpre, très-double, belle variété.

Magazine  (1863)  Page(s) 293.  
 
Edulis ou albiflora....Louis Vanhoutte; fleur grande, rouge violacé vif.