Book  (Aug 2002)  Page(s) 48.  
 
Ilse Krohn Superior
Hybrid Kordesii 1964
Rated 7.6

Book  (2001)  Page(s) 51.  
 
Ilse Krohn Superior Hybrid Kordesii, white, 1964. Rating: 7.6

Book  (Dec 1998)  Page(s) 310.  
 
Ilse Krohn Superior Modern Shrub. Kordes (Germany) 1964. Parentage: Sport of 'Ilse Krohn'. Description... flowers are double and white... It is hardy and resistant to black spot...

Website/Catalog  (1985)  Page(s) 25.  
 

Ilse Krohn Superior* (Climber) An unusual, pure white, fully double flower from a high centred bud. Very healthy glossy foliage. Vigorous. 1957. P. T. N. Shade tolerant. (S) 15 x 10’