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'Tigris' rose References
Book  (2010)  Page(s) 92.  
 
Peter Harkness. An Update on Persica Hybrids.
....it was decided to introduce four of them, rather than see them perhaps lost for ever.
Tigris [HARprier] (R. persica x 'Trier') was pollinated in 1975 and introduced in 1985, and bears small, canary yellow double rosettes with deep red petal 'eyes' on a low compact plant.
Book  (1996)  Page(s) 82.  
 
Tigris (HARprier) Persica hybrid... canary yellow double rosettes with red eye at petal bases... Parentage: R. persica x 'Trier'. Harkness (England) 1985.
Book  (1996)  Page(s) 52.  Includes photo(s).
 
Tigris (HARprier) Persica hybrid shrub... one of a few varieties successfuly bred from [R. persica]... Harkness 1985
Book  (1993)  Page(s) 65.  Includes photo(s).
 
[Listed under "Wild Roses and Their Cultivars"] One of the three hybrids (the others are 'Euphrates' and 'Nigel Hawthorne') which have been introduced since 1968 when Alec Cocker and Jack Harkness in Britain obtained seeds of Rosa persica and started a breeding programme to try to raise roses with a red eye.
Book  (1988)  Page(s) 8.  
 
[In his foreward to this book, Peter Hering writes:] 'Tigris' and 'Euphrates' … have been created by crosses with Rosa (or Hulthemia) persica, a strange plant that has sometimes been included with the Rose family and sometimes put in a genus of its own. Work with persica is difficult and has rarely been attended with any success. These two varieties represent a very significant accomplishment for Harkness & Co.
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