Website/Catalog  (9 Jun 2016)  
 
Registered Name: 'Heidelberg'
Synonyms: 'Gruss an Heidelberg', 'Korbe'
ARS Approved Exhibition Name: Heidelberg
HKor, mr, 1959, Kordes, R.; flowers bright crimson, reverse lighter, 4 in., 32 petals, high-centered, borne singly or in small clusters; recurrent ; foliage dark green, glossy, leathery; very vigorous, tall, bushy growth
[Minna Kordes × Floradora]

Booklet  (2008)  
 
Mother Blocks. p22
Planting Scheme 1961. Heidelberg (Sparrieshoop x World's Fair)

Book  (Aug 2002)  Page(s) 47.  
 
Heidelberg
Rated 8.7

Book  (2001)  Page(s) 49.  
 
Heidelberg Hybrid Kordesii, medium red, 1959. Rating: 8.7

Book  (19 Apr 2000)  Page(s) 282.  
 
'KORbe', HKor, mr, 1959; (Grüss an Heidelberg, Heidelberg); description; Kordes, R.; McGredy

Book  (Apr 1999)  Page(s) 555.  
 
Gruss an Heidelberg Lambertiana. Wilhelm Kordes 1959

Book  (Mar 1995)  Page(s) 138.  
 
Heidelberg ('Gruss an Heidelberg') Kordes (Germany) 1959. Shrub. Description... bright crimson with a rose red reverse...

Book  (Apr 1993)  Page(s) 239.  
 
Kordesii (Shrub), medium red, 1959, (KORbe; 'Grüss an Heidelberg'); Kordes, R.; McGredy. Flowers bright crimson, reverse lighter, double (32 petals), high-centered, large (4 in.) blooms in clusters; foliage glossy, leathery; very vigorous, bushy growth.

Book  (Feb 1993)  Page(s) 159.  
 
Heidelberg ('Grüss and Heidelberg') Cluster-flowered climber. Parentage: 'World's Fair' x 'Floradora'. Germany 1959. Description and cultivation... large, well-packed clusters of double, bright crimson flowers with a lighter coloured reverse...

Article (magazine)  (1988)  Page(s) 29.  
 
[Colour description according to the CIELAB colour space (petal inside): L* = Lightness, a* = red-green axis, b* = yellow-blue axis]
'Gruss an Heidelberg' (Kordes, 59; bright carmine), L* 36-47, a* 55-64, b* 11-24