Article (magazine)  (Jan 1955)  Page(s) 56.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Chinese, Purple, 'Col. Malcolm' (Chin.-For. 1846), [Nurseries] Cottage Gardens

Website/Catalog  (1924)  Page(s) 151.  
 
Pivoines en arbre...Colonel Malcoln.- Grande, pleine, globuleuse, pourpre violacé clair.

Website/Catalog  (1890)  Page(s) 32.  
 
Pæonia Arborea (Tree or Moutan Pæonies).
General Collection.
Colonel Malcolm, double, clear lilac.

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.
Colonel Malcolm, deep violet purple

Magazine  (26 Feb 1876)  Page(s) 197.  
 
The Best Tree Peonies.
The following list contains some of the very best varieties of tree Peonies or Moutans at present in cultivation; I obtained it from my friend M. Charles Verdier, of Paris, who makes Peonies his special study; among them, as will be seen, are few novelties, but M. Verdier states that the newer varieties are generally inferior to the older kinds:
Colonel Malcolm, violet...

Website/Catalog  (1873)  Page(s) 61.  
 
Paeonia arborea. Pivoines en arbre.
5. Colonel Malcolm. Große prächtige Blume, dunkellila. Fleur très-large, lilas pourpre, extra...5 fr.

Magazine  (29 Jun 1872)  Page(s) 701.  
 
The Best Pæonies.
In examining a collection of Herbaceous and Tree Pæonies lately, we have decided that (although all are ornamental) there are in reality but a few worthy of cultivation. Of these the following is a list:
Tree Pæonies: Bijou de Chusan, Carolina, Colonel Malcolm, Comte de Flandres, Donckelaarii, Elizabeth, fragrans maxima plena, Lambertiana, La Ville de Saint Denis, Louise Mouchelet, Madame Stuart Low, Osiris, Ranieri, Jules Pirlot, Rinzii, Rosa Mundi, Triomphe de Vandermalin, Vandermaelii, Van Houttei, and Zenobia.

Magazine  (Jun 1864)  Page(s) 163.  
 
La seconde Exposition partielle de la Société impériale et centrale d'horticulture de France a eu lieu à Paris du 14 au 19 mai dernier. ...M. Paillet ...Dans son lot de Pivoines en arbres, figuraient quelques nouvelles variétés dela Chine: Osiris, Colonel Malcolm, purpurea.

Magazine  (1863)  Page(s) 292.  
 
Choix des meilleures variétés de Pivoines en arbre, nouvellement introduites....
Colonel Malcolm; fleur très-pleine, bien faite, violet clair.

Website/Catalog  (1861)  Page(s) 58.  
 
New Chinese Tree Paeonias introduced by Mr. R. Fortune.
The followng magnificent tree-like peonies surpass by the gloss of their colours and the size of their blooms all variety known to-date and distinguish themselves namely also by their partly pure white, partly dark red colouring from all known varieties.
64. Colonel Malcolm, purple-red, full....3 Prussian Thalers