Website/Catalog  (1912)  Page(s) 78.  
 
Summer and Autumn Clematis.
In bloom from July to October.
These flower upon the wood of the current year's growth, and should therefore be pruned to five or six eyes.  The varieties most suitable for bedding are marked thus* 
*Prince of Wales, deep pucy purple...  1s. 6d.

Book  (1906)  Page(s) 53.  
 
Principal garden varieties of Clematis:
Jackmanni type.  (July to October.)
Prince of Wales... Deep puce-purple.

Magazine  (1884)  Page(s) 142.  
 
Prince of Wales. Dark blue, very beautiful, VII-X.

Magazine  (Nov 1881)  Page(s) 172-3.  
 
A Few Words About the Clematis.
It is hardly fair to give so lovely a plant as the Clematis a mere passing mention.  The tender, faint, silvery white of C. Lucie Lemoine, the broad gleaming white of C. Gloire de St. Julienne and Henryii, and the rich royal purple of C. Thomas Moore, Prince of Wales, patens or azurea, and Jackmani, the latter almost the best of all, come to us as a surprise; almost a miracle as we first behold their tender petals resting on masses of shining leaves.

Magazine  (1877)  Page(s) 270.  
 
Clematis Prince of Wales (Jackman); pourpre.

Website/Catalog  (1875)  Page(s) 79.  
 
CLEMATIS. Virgin's Bower.  Waldrebe, Ger. Clematite, Fr.
The Clematis are elegant, slender branched shrubs, of rapid growth, handsome foliage and beautiful large flowers of all colors.  The newer varieties introduced within the last five or six years are great acquisitions.  Either in the open ground as pillar plants, bedding plants, single plants in masses or about rock-work, or cultivated in pots or tubs, the Clematis cannot be excelled.
We append the following from the English "Gardener." Jackman's Clematises: "They are magnificent; and more than this, they do give us some of the grandest things in the way of creepers the horticultural world has ever seen, making glorious ornaments either for walls, verandahs, or rustic poles or pillars, varying in color from deep rich violet hue to dark velvety maroon, and in the newer seedling forms, beautiful shades of pale bright blue."
They will stand the severest Winters if the roots are slightly covered.
Class I. Perpetuals, Flowering in the Summer and Autumn, on Summer Shoots.
C. Prince of Wales.  Deep violet purple with red bars down the center.  $1.00.

Book  (1872)  Page(s) 135.  
 
C. PRINCE OF WALES (Jackman) .—This is one of the Woking hybrids of the true Jackmanni type, that is, free and continuously successional in flowering. It resembles C. rubro-violacea, one of the first of the Woking brood which was distributed, of which it may be regarded as an improvement. The leaves are pinnatisect, with five leaflets (three in the less developed condition of the plant) which are large, and of a bold cordate outline. The flowers are of a deep pucy-purple, with a dark red- tinted bar in the centre of each of the broadly oval apiculate sepals, four to six in number, while the central tuft of stamens appears greenish, from the green colour of their filaments. It is a fine showy variety, differing from C. Jackmanni in the shade of colour in the flowers, and was awarded a First-class Certificate at South Kensington in June, 1865.