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.  
Symesiana, pale mauve of bluish lavender, fine flowers...  1s. 6d.

Website/Catalog  (1888)  Page(s) 40.  
 
Clematis.
Class II.
Comprising varieties which flower continuously from April until Autumn, and others from June to October.
Symeana.

Magazine  (1877)  Page(s) 271.  
 
Note sur la Clématite et ses variétés, par M. Delépine, aîné
(Bulletin de la Soc. ind. et agric. d'Angers, 1875, p.175).
Clématites de pleine terre.
Clematis Symeana (Henry Anderson); mauve pâle.

Book  (1872)  Page(s) 145.  
 
C. SYMESIANA (Anderson-Henry).—A fine hybrid raised by Mr. Anderson-Henry, and placed in the hands of the Messrs. Lawson and Sons. It is of the race of C. lanuginosa, having been raised by crossing that species with C. Fortunei, and like its parent bears very large flowers in succession from August (probably July in the South) till November. The flowers are from seven to eight inches in diameter, and consist of from six to eight broad sepals, which are of a beautiful shade of pale mauve or lavender-colour. It is said to be a profuse bloomer.