- ‘Aaron’s Ruby’
- ‘Ace of Hearts’
- ‘Ada Pieper’
- ‘Adelina Patti’
- ‘Adeyaka’
- ‘Admiral Spry’
- ‘Adolphe Audusson’
- ‘Adolphe Audusson Variegated’
- ‘Adorable’
- ‘Agnes of the Oaks’
- ‘Akashigata’
- ‘Akebono’
- ‘Alba Plena di Casoretti’
- ‘Alba Grandiflora’
- ‘Alba Plena’
- ‘Alba Simplex’
- ‘Alexander Hunter’
- ‘Alexis Smith’
- ‘Alfredo Capellini’
- ‘Alice Wood’
- ‘Alison Leigh Woodroof’
- ‘Althaeiflora’
- ‘Amazing Graces’
- ‘Andromeda’
- ‘Anemone Frill’
- ‘Anemoniflora’
- ‘Angel’
- ‘Anna M. Page’
- ‘Anne Smith’
- ‘Annette Carol’
- ‘Annette Carol’
- ‘Annie Wylam’
- ‘Ann Sothern’
- ‘Anticipation’
- ‘Anticipation’
- ‘Anticipation Variegated’
- ‘Apollo Variegated’
- ‘Apple Blossom’
- ‘Apple Blossom’
- ‘April Rose’
- ‘Arciduchessa Augusta’
- ‘Ardoch’
- ‘Ariel’s Song’
- ‘Ariel’s Song’
- ‘Arthur Gayle’
- ‘Aspasia Macarthur’
- ‘Auburn White’
- ‘Auguste Delfosse’
- ‘Augusto Leal de Gouveia Pinto’
- ‘Australis’
- ‘Ave Maria’
- ‘A.W. Jessep’