Book  (Dec 1998)  Page(s) 314-315.  Includes photo(s).
 
Invincible (RUnatru, 'Fennica'( Floribunda. de Ruiter (The Netherlands) 1983. Description... Dark crimson...

Book  (1996)  Page(s) 46.  
 
Invincible (RUNatru) Cluster-flowered (Floribunda) bush. Description. Flowers: bright red. Parentage: 'Rubella' x 'National Trust'. De Ruiter (Holland) 1983.

Book  (Sep 1993)  Page(s) 223.  Includes photo(s).
 
Invincible Cluster-flowered. Description... dark crimson. Parentage: 'Rubella' x 'National Trust'.

Book  (Apr 1993)  Page(s) 260.  
 
Invincible Floribunda, dark red, 1983, (RUNtru; 'Fennica'); 'Rubella' x 'National Trust'; deRuiter. Description.

Book  (Feb 1993)  Page(s) 233.  Includes photo(s).
 
Invincible ('Fennica', RUNatru) Cluster-flowered floribunda. Parentage: 'Rubella' x 'National Trust'. The Netherlands 1983. Description and cultivation... Bright red semi-double flowers...

Book  (1984)  Page(s) 117.  
 
Anna Pawsey. New Varieties 1983.
'Invincible'....Named in tribute to servicemen

Website/Catalog  Page(s) 16.  Includes photo(s).
 
A bright red floribunda with well formed large 'hybrid tea like' blooms abundantly produced in clusters on a vigorous upright growin gplan. Its' rich colour is retained throughout, withstanding the most difficult weather conditions. Growing to between 24 and 30 inches tall with a neat and even habit. Especially useful for bedding and mass planting.