Book  (Apr 1907)  Page(s) 27.  
 
179. ARETHUSA, P. moutan
(1) 1875, Horticulturist, p. 79.
(2) 1899, Peter Barr Cat. p. 46.
 

Magazine  (1874)  Page(s) 25.  
 
Mr. W. C. Barry... presented the following report:
On Tree and Herbaceous Pæonies.
Tree Pæonies fill up a blank between deciduous flowering-trees and flowering shrubs.  In mixed borders they are invaluable, as well when grown as single specimens on the lawn.  They are quite hardy, but slight protection greatly improves them. [...]
To assist those who desire to form a collection we name the following choice sorts.  Any description, however complete, would fail to do them justice, so we give only the distinguishing colors. 
Arethusa.—Light rose, shaded with purple; this is a very large and fragrant variety, and a vigorous grower.

Website/Catalog  (1861)  Page(s) 58.  
 
Paeonia Arborea.
38. Arethusa (Oudin), large, double, carmine-pink.... 20 Neugroschen

Website/Catalog  (1860)  Page(s) 27.  
 
Chinese Tree Pæonies. — Pæonia Moutan.
These are the most splendid and showy of all flowering shrubs, and among the most rare.
The flowers are mostly fragrant, and all are double, unless denoted otherwise.  They are perfectly hardy, and will withstand the winters of our most northern States and the Canadas.  They bloom in May, ten to fifteen days before the Chinese Herbaceous varieties.
The following are imported varieties.  We can supply extra size plants of most of the varieties, at a moderate advance in prices.
29. Arethusa...  White, centre bright crimson, very fine...  $1.50 to $2.50