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Used as verification of names of cultivars and referred to in the Register and Checklist
R- ‘RDF Ger.’
- ‘Read R.G. UK.’
- ‘Red Cliffs Aust.’
- ‘Riley’s Nurseries RSA.’
- ‘Road Runner Ranch USA.’
- ‘Rober USA.’
- ‘Rohweder, Heinrich Ger.’
- ‘Rosebank Nursery. Wood W.H. Aust.’
- ‘Rosedale Nurseries (Delmar Miniatures) UK.’
- ‘Royal Nurseries. Scott, J. & Sons Aust.’