Magazine  (2016)  Page(s) Table S2.  
 
leopold ritter, Origin of the sample: Loubert Rose Garden, Genetic group 6, Percentage of assignation: 60.2, 1899, HMult, Geschwind, Origin: Europe W, Ploidy: 4, measured

Book  (2003)  Page(s) 59.  
 
Geschwind's Hybrids of 'De La Grifferaie'....
'Leopold Ritter' (Geschwind, 1900). Description.

Book  (1996)  Page(s) 60.  
 
'Leopold Ritter' (Geschwind 1890) hybrid multiflora red, medium size, semi-double, flat. Vigorous.

Book  (1936)  Page(s) 611.  
 
Ritter, Leopold (multiflora) Geschwind ca. 1900; blood-red, medium-size, semi-double, flat, in clusters of 3-7, once-blooming, occasional repeat, growth 8/10, climbing, 2 m., hardy. Sangerhausen