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Nomenclatural Novelties in Rosa (Rosaceae) subgenus Rosa Recognized in North America
(8 Dec 2016)
One new species, R. memoryae W. H. Lewis, and one new subspecies, R. virginiana Mill. subsp. minidentata W. H. Lewis, are described.
(8 Dec 2016)
one new subspecies, R. virginiana Mill. subsp. minidentata W. H. Lewis....
(8 Dec 2016)
Rosa ×atlantica W. H. Lewis
(8 Dec 2016)
Rosa xcanadensis W. H. Lewis
(8 Dec 2016)
Rosa ×churchillii W. H. Lewis
(8 Dec 2016)
The existing nothospecies Rosa ×engelmannii S. Watson, of parentage R. acicularis Lindl. × R. nutkana C. Presl, is divided into three nothosubspecies: nothosubspecies engelmannii, nothosubspecies occidentalis W. H. Lewis, and nothosubspecies britannicae-columbiae W. H. Lewis, distinguished by parentage involving three different subspecies of R. nutkana.
(8 Dec 2016)
Rosa ×fernaldiorum W. H. Lewis
(8 Dec 2016)
The existing nothospecies Rosa ×engelmannii S. Watson, of parentage R. acicularis Lindl. × R. nutkana C. Presl, is divided into three nothosubspecies: nothosubspecies engelmannii, nothosubspecies occidentalis W. H. Lewis, and nothosubspecies britannicae-columbiae W. H. Lewis, distinguished by parentage involving three different subspecies of R. nutkana.
(8 Dec 2016)
The existing nothospecies Rosa ×engelmannii S. Watson, of parentage R. acicularis Lindl. × R. nutkana C. Presl, is divided into three nothosubspecies: nothosubspecies engelmannii, nothosubspecies occidentalis W. H. Lewis, and nothosubspecies britannicae-columbiae W. H. Lewis, distinguished by parentage involving three different subspecies of R. nutkana.
(8 Dec 2016)
Rosa ×gilmaniana W. H. Lewis
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