Magazine  (28 Jul 1937)  Page(s) 56.  
 
TWENTY BEST LARGE-FLOWERED HYBRIDS OBTAINABLE IN THIS COUNTRY
Duchess of Albany* [see footnote] Texensis Type
All bloom on new wood except Belle of Woking and Sir Garnet Wolseley

*Or any other Texensis Hybrid, Duchess of York, Countess of Onslow, Grace Darling, Admiration, all with trumpet-shaped flowers in shades of pink or scarlet.

Website/Catalog  (1924)  Page(s) 106.  
 
Duchess of York (Hybride de coccinea). Rose rougeâtre.

Website/Catalog  (1914)  Page(s) 109.  
 
Clematis Coccinea Hybrids
Duchess of York. A delicate and pleasing shade of pale pink.

Website/Catalog  (1912)  Page(s) 78.  
 
Hybrid Clematis.
The following are Hybrid varieties raised from C. Coccinea; they have been certificated by the Horticultural Society, and are decidedly pretty and most distinct.
Duchess of York, Pale blush pink, of a delicate and very pleasant shade of colour, with a deeper tinge down the centre of each petal, of campanulate form, and quite hardy...  1s. 6d.

Website/Catalog  (1907)  Page(s) 65.  
 
Clematis in pots to plant out in spring and summer.
New Varieties.
136 Duchess of York (coccinea hybrid), pale blush pink.

Book  (1906)  Page(s) 54.  
 
Principal garden varieties of Clematis:
Viorna type.  (July to September.)
Coccinea hybrids.
Duchess of York... Pale blush pink, deeper in the centre, bell-shape.

Book  (1904)  Page(s) 332.  
 
Climbing plants.
Flowers smaller, pitcher-shaped or tubular.
21.  Clematis Viorna, var. coccinea, A. Gray (C. coccinea, Engelm.). Leaves glaucous, subcoriaceous; leaflets broader than the type, often obtuse or retuse; sepals carmine or scarlet.  Texas.  Lav. 19 (as C. Texensis).  B.M. 6594.  Gn. 19:275.  Gt. 32:86.  R.H. 1878:10; 1888:348. — Much superior to the type, because of its beautiful flowers.  Some of the garden forms of this variety, which have probably been produced by crossing it with hardier Clematises, are found under the names: Countess of Onslow, deep scarlet, G. C. III. 16:9; Countess of York [sic], white tinted with pink; Duchess of Albany, clear pink, Gn. 52:1140.

Website/Catalog  (1900)  Page(s) 17.  
 
NEW HARDY HYBRID CLEMATIS COCCINEA.
Duchess of York. A delicate and pleasing shade of pale pink, with a deeper tinge in the center of each petal, of which there are from four to six to each bloom; campanulate form. Strong plants, $2.00 each.

Book  (1898)  Page(s) 73.  
 
Variétés Horticoles
IVe Groupe. — Viorna. 
Les trois suivantes, dès maintenant au conmerce, sont des gains de MM. Jackman:
Duchess of York, Fleur rose carné, avec des bandes médianes plus foncées; coloris très delicat.