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Used as verification of names of cultivars and referred to in the Register and Checklist
A- ‘Abermule Nurseries UK.’
- ‘Alexander M. Aust.’
- ‘Anderson & Co. Aust.’
- ‘Anderson J.N. NZ.’
- ‘Arcadia UK.’
- ‘Armitage USA.’
- ‘Arndt Milton H. USA.’
- ‘Ashdown Forest Nurseries Ltd. Lake S.E. UK.’
- ‘Ashfield Nurseries UK.’
- ‘Ayton, Anthony C. UK.’