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Species Profile - Rosa harisonii (Harison's Yellow)
(1997)  
 
Harison's Yellow It is a tetraploid rose with 28 chromosomes. Pollen can be used from it or crosses can be made on to it successfully. In most cases, pollen is commonly used. Perhaps that is because germination of see from R. spinosissima and its hybrids can be difficult....Self-pollinated seedling rarely possess as deep of yellow flowers as its parent. And hybrid between other roses may be sterile.
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