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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.
W- ‘Widow’
- ‘Will if I can’
- ‘William Battson’
- ‘William Cromwell’
- ‘William Ewing’
- ‘William Lines’
- ‘William the Conqueror’
- ‘William von Wurtemburg’
- ‘Willie’
- ‘Wilsh Alba’
- ‘Wilsh Rosia’
- ‘Windsor Castle’
- ‘Winter Morn’
- ‘Witch’
- ‘Witch Doctor’
- ‘Witte Appel’
- ‘Wizard’
- ‘Wm. Von. Nurtemberg’
- ‘Wood’s Challenge’
- ‘Woodward’s Gardens’
- ‘Worley’
- ‘Wormwood’
- ‘Wright’s Delight’
- ‘Wyangala’
- ‘Wyck Peltatum’
Y- ‘Yarrabee’
- ‘Yeatmannianum Grandiifl’
- ‘Yellow Christine’
- ‘Yesterday’s Dream’
- ‘Ytolinaki’
Z- ‘Zanzumin’
- ‘Zaria’
- ‘Zebra’
- ‘Zelina’
- ‘Zenlica D’ Amand’
- ‘Zetulbe’
- ‘Zonnestrael’
- ‘Zonquil’
- ‘Zuccarini’
- ‘Zulu’
- ‘Zurich’