Unsupported cultivar names

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In the following list, cultivar names have been recorded without attribution or description and additional information is unavailable at the time of going to print.

History or knowledge of these cultivars should be sent to the Registrar for inclusion in the Addendum.

    A
  • ‘A.E. Blake Amos’
  • ‘A.F. Barton’
  • ‘Ad. Feyrabend’
  • ‘Ada’
  • ‘Adela’
  • ‘Admiral Trumpp’
  • ‘Adriane Cambria’
  • ‘Aduna’
  • ‘Aerolite’
  • ‘Agnes Chambers’
  • ‘Agnes Sppd.’
  • ‘Agrippina’
  • ‘Ahwanee’
  • ‘Alba Grandiflora’
  • ‘Alba Multiflora’
  • ‘Alboni’
  • ‘Album Plenum’
  • ‘All Spice’
  • ‘Allecia’
  • ‘Alphonse Karr’
  • ‘Alsacien-Lorrain’
  • ‘Amato’
  • ‘Amazon’
  • ‘Amazone’
  • ‘Ambassadress’
  • ‘Amelie’
  • ‘Amelie Halphen’
  • ‘American Snowflake’
  • ‘Amerikaanse Knoop’
  • ‘Amulet’
  • ‘Amy Robsart’
  • ‘Amy Rubotin’
  • ‘Andenken an Keiser Augusta Viktoria’
  • ‘Andenken an Ulm’
  • ‘Angeline’
  • ‘Ann Grey’
  • ‘Anna Boleyn’
  • ‘Anna Duval’
  • ‘Anna Fehringer’
  • ‘Anna Hock’
  • ‘Anna Powlowna’
  • ‘Annie Findlay’
  • ‘Annie Keeler’
  • ‘Annie Maria’
  • ‘Annulus’
  • ‘Antler’
  • ‘Antomina’
  • ‘Antonii’
  • ‘Antonin Crozy’
  • ‘Antony Lamotte’