Book  (1928)  Page(s) 247.  
 
Tree Peony Check List
Adelaide. (Koch, 1889.) Charles Van Geert 1893; Louis Van Houtte 1896; Louis Paillet 1889 as new.

Book  (1907)  Page(s) 16.  
 
34. ADELAIDE; P. moutan.
(1) 1899, L. Paillet Cat.

Website/Catalog  (1903)  Page(s) 26.  
 
Pæonia Arborea (Tree Peonies)
The Tree Peony is really one of the finest plants available for the garden or the conservatory; it is quite hardy and does well under the simplest treatment. The smallest one will flourish in the most astonishing manner, bearing blossoms from 6 to 8 inches across, which will increase every year in beauty and size. In colors, the flowers range in great variety, from a white to a nearly reddish black. [...]
Price: Two-year old, named varieties, purchaser's selection, $1.25 each, $12.00 per dozen...
Adelaide. Pure white, shaded lilac, grand, well formed blooms.