Website/Catalog  (9 Jun 2020)  Includes photo(s).
 
Clematis Countess of Lovelace. Bred in: Great Britain. Plant height: 1.7-2.9 m.  Flowering period: May - October.  Flower color: blue.  Flower diameter: 12-15 cm. Pruning group: 2
 

Book  (Oct 2001)  Page(s) 160.  Includes photo(s).

Website/Catalog  (1921)  Page(s) 61.  
 
Countess of Lavelay. Lilac-blue

Website/Catalog  (1912)  Page(s) 77.  
 
Spring & Summer Flowering Clematis.
Flowering during May, June and July.
As these flower upon the ripened wood of preceding year's growth, they must be but slightly pruned in winter.
Countess of Lovelace, double, deep lilac...  1s. 6d

Website/Catalog  (1907)  Page(s) 65.  
 
Clematis in pots to plant out in spring and summer.
General Collection.
10 Countess of Lovelace (florida), bluish lilac.

Website/Catalog  (1907)  Page(s) 75.  
 
Comtess of Lovelace, blusih lilac double.

Book  (1906)  Page(s) 52.  
 
Principal garden varieties of Clematis:
Florida type. (June and July.)
Countess of Lovelace... Bluish lilac (rosette).

Book  (1898)  Page(s) 67.  
 
Variétés Horticoles
1er Groupe.—PATENS
Section. IV.—Patens à fleurs doubles.
Countess of Lovelace (Jackman). Belle fleur pleine, à longs sépales lancéolés, d'un beau lilas bleuâtre.

Magazine  (1877)  Page(s) 260, 267.  
 
p. 260: Countess of Lovelace. Flor. and Pomol., 1876, 133, c. ic. col.

p. 267: Clematis Countess of Lovelace (Jackman), s. patens; double-lilas.

Magazine  (Jun 1876)  Page(s) 133.  Includes photo(s).
 
We need only to invite attention to the accompanying very accurate figures of two new varieties of Clematis to convince our readers that they have here before them some sterling novelties.... fig. 2 that named Countess of Lovelace, both raised by Mr. G. Jackman, of the Woking Nursery....The latter is just now in process of distribution, and is unquestionably the finest of the double-flowered varieties yet known; indeed, a specimen plant of it, shown in a group of well-grown examples staged at a recent exhibition at the Royal Aquarium, was most strikingly beautiful. ....Clematis Countess of Lovelace may be described as a much improved John Gould Veitch, the flowers being of a better colour, and the petal-like segments without the long claw which makes the centre of that variety thin and open, where this is close and dense. This, no doubt, belongs also to the early lanuginosa section. It has ternate leaves, with large broadly-ovate leaflets, and flowers measuring about six inches across, composed of six or seven tiers of deep bluish-mauve florets, surrounded by
a guard of eight large broad sepals of a somewhat deeper or purplish blue.