Book  (Jan 2000)  Page(s) 230.  
 
Lactea Tree Peony. David or Guerin 1839... white

Article (magazine)  (Jan 1955)  Page(s) 58.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Chinese, White, 'Lactea' (David 1839 or Guerin), [Nurseries] Oberlin Peony Gardens

Website/Catalog  (1941)  Page(s) [3].  
 
Tree Peonies
Lactea. Large; double; pure white. Profuse; low-growing...$5 00

Website/Catalog  (1924)  Page(s) 151.  
 
Pivoines en arbre...Lactea.- Moyenne, pleine, blanc pur, onglet violet.

Book  (1917)  Page(s) 214.  
 
After forcing, tree peonies require two or three years for recuperation. Because the blooms of double-flowered varieties last longer upon the plant, those varieties are best for forcing. Reine Elizabeth, Lactea, Jules Pirlot and Lord Macartnay are excellent for this purpose.

Magazine  (Mar 1912)  Page(s) 187.  
 
Association horticole lyonnaise Procès-verbal de l’Assemblée générale du dimanche 21 Avril 1912 ...
Examen des apports. — Sont déposés sur les tables les produits suivants :....- Par M. Janichon, jardinier chez M. Godinot, à Tassin (Rhône) : Un très intéressant apport se composant de quelques variétés de Pivoines en arbres, fleurs coupées, soit : Reine Elisabeth, Fragrans, Moutan, Lactia ....
....A M. Janichon, pour l’ensemble de son apport, prime de 2^e classe

Website/Catalog  (1910)  Page(s) 36.  
 
European Grown Tree Peonies
Lactea. Very double pure white with carmine spots at the base of the petals.

Website/Catalog  (1910)  Page(s) 38.  
 
Paeonia arborea...Lactea. Medium-size very double, perfectly high-centered bloom. Milk-white with cream bonnet. Very floriferous and short.

Website/Catalog  (1893)  Page(s) 41.  
 
Tree Pæonies.  Pæonia Arborea.
This beautiful group of shrubs is among the oldest of introductions from Japan, but magnificent new varieties have been added from year to year until we have a long list of wonderful forms.  They are quite distinct from the herbaceous section, and have shades of color not found in the latter; and when once established form compact bushes, which in spring are covered with the gigantic blooms.  These pæonies are a little tender in exposed situations north of Boston; but if planted in a sheltered, warm location, and protected during the first two winters by a covering of pine boughs, or other loose material, will eventually establish themselves, and form one of the most decorative features of the garden.  Like the herbaceous kinds, they enjoy rich soil, and the blooms last longer and come finer when partially sheltered from the hot sun.  They are well worth the little trouble entailed in their cultivation.  We can offer strong plants of the leading and most hardy kinds; but as they are slow and difficult of propagation, this fact will account for their relatively higher cost over the herbaceous kinds.  Having secured a large stock of these beautiful plants, we are enabled to offer them at lower prices than ever before.  2 year plants, 75 cents each; 3 year plants, $1.00 each.
Lactea.  Milk white, and handsome flower.  

Magazine  (22 Jan 1887)  Page(s) 77.  
 
The Tree Pæony. 
...For the last twenty years or longer we have had to look to our French neighbours for new sorts of Tree Pæony, for since they have taken the work of hybridising and raising seedlings in hand they have supplied us with all the finest sorts.  Until now the list is long- too long, in fact, for names are given where very shadowy differences exist.
List of select Varieties.
Lactea, one of the best whites