Book  (Apr 1999)  Page(s) 402.  
 
Friedrichsruh ('Friedricharah') Hybrid Tea. Türke 1907. Parentage: 'Princesse de Béarn' x 'Francis Dubreuil'. The author cites information from different sources... Deep blood-crimson... almost black-red Rose with flowers that darken as they grow older, making on the darkest red Roses known...

Book  (1947)  Page(s) 150.  
 
Friedrichsruhe (H.T.) closely resembles Château de Clos Vougeot except in its crimson rather than crimson-scarlet colouring. Turke 1908. Vigorous. Very fragrant...June-September. Hardy.

Book  (1937)  Page(s) 91.  
 
A sort of restful name is Friedrichsruh.  HT. (Turke, 1908), for a very dark crimson flower with blackish shadings, double and fragrant, coming on a good plant a half yard in height.  It is of the general type of 'Chateau de Clos Vougeot' and is in comparison with the newer 'Nigrette' and 'Will Rogers'.

Book  (1936)  Page(s) 282.  
 
Friedrichsruh (HT) Türke 1907; Psse de Béarn X Francis Dubreuil; velvety deep blood-red to chestnut-red, shaded blackish purple, large to very large, very double, globular, solitary, fragrance 7/10, floriferous, continuous bloom with interruptions, long & strong stems, growth 6/10, bushy, short, hardy. Sangerhausen

Book  (1934)  
 
Friedrichsruh (H.T.): Flower deep blood-crimson, very free and sweet. Growth vigorous.
 

Website/Catalog  (1933)  Page(s) 90.  
 
Friedrichsruh (Hybrid Tea). Dark purple (9,5 ra). Growth is vigorous, but stocky. Floriferous, deliciously fragrant...Low garden plants 1 piece RM [Reichsmark] -.60  
 

Book  (1932)  Page(s) 175.  
 
Proof of the Pudding.
Editor: 'Ami Quinard' darker than Friedrichsruh. 

Website/Catalog  (1929)  Page(s) 18.  
 
Everblooming Roses
The so-called Everblooming Roses include the Hybrid Tea and Pernetiana groups. They do not bloom all the time, but if kept healthy and growing steadily, one crop of flowers succeeds another at brief intervals.
Friedrichsruh. Hybrid Tea. (Türke, 1907.) Dark, wine-red blooms, with still darker shadows; flat form but double to center and intensely fragrant. Plant spreading, with long, nearly horizontal stems; very free flowering and apparently free from disease.
Of the Chateau de Clos Vougeot type with a more vinous color and of freer growth. No Rose in commerce has more petals and no Rose is more fragrant.

Website/Catalog  (1928)  Page(s) 17.  
 
Everblooming roses—Shades of Red
Friedrichsruh. Hybrid Tea. A profuse-blooming, intensely sweet-scented, almost black-red Rose. It has short petals and is cushion-shaped when fully opened, for it is full to the center. In color it is almost as deep as Chateau de Clos Vougeot, but the plant is much more upright. A record variety for the amount of blooms produced in a season. $1 each. 

Book  (1927)  Page(s) 142.  
 
The Proof of the Pudding.
'Prince Yugala' HT. (F. Cant, 1923).  ARA 1923.  ....is darker than either 'Chateau de Clos Vougeot' or Friederichsruhe