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Glossary ListGlossary Term 
xHulthemosa represents hybrids between the genus Hulthemia, of which Hulthemia Perisca is the single representative, and the genus Rosa. These hybrids are also known as Persica hybrids. Jack Harkness was reknowned for his use of H. persica to produce such roses as 'Nigel Hawthorne.'

Taxonomists do not agree about the status of Hulthemia Perisca or Rosa persica - - whether it belongs in the separate genus Hulthemia or only in a separate section within the genus Rosa.
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