Book  (Jan 2000)  Page(s) 226.  
 
Caroline of Italy Tree Peony. Origin unknown pre-1846... red

Book  (1917)  Page(s) 112.  
 
Caroline d'Italie, which has finely formed flowers of silvery flesh colour, with a reflex of salmon.
 

Website/Catalog  (1906)  Page(s) 37.  
 
Paeonia arborea. Tree-Peonies. A selection of especially fine double sorts.
Caroline d'Italie, soft salmon-coloured with cream, ruffled, densely filled medium sized cup form.

Magazine  (20 Apr 1889)  Page(s) 354.  
 
Moutan Paeonies in pots.—Although it is a century since the Moutan or Tree Pæony was introduced into this country, it is by no means a common plant, and is not grown nearly as much as its merits deserve.  Many of the new varieties far excel the typical form both in size and colour of the flowers.  Pæonies will not force early, but grown as pot plants and kept in a cold frame, they produce a grand display of bloom at this time of year.  Being gross feeders they require liberal treatment, and should never be allowed to get dry.  Amongst the best varieties are Reine Elizabeth, Comte de Flandres, Caroline, Impératrice Josephine, and Salmonea.  A fine group of these is a great attraction in the greenhouse at Kew. — F. G.

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.
34. Caroline...  Caroline...  $2.00 

Website/Catalog  (1855)  Page(s) 16.  
 
Tree Pæonies.
Among the choicest hardy shrubs, the Tree Pæony and its numerous varieties stand preeminent.  By the labors of the French and Belgian cultivators, many new varieties have been produced, of remarkable beauty, and distinct in their character.  A larger part of these have been added to our collection, and yearly accessions will be made till all are added to our list.
Caroline...  $2.00