Noms scientifiques : W
- Wachendorfia thyrsiflora
- Waldsteinia geoides
- Waldsteinia ternata
- Washingtonia robusta
- Watsonia borbonica subsp. ardernei
- Weigela florida
- Weigela florida 'Abel Carrière'
- Weigela florida 'Alexandra'
- Weigela florida 'All Summer Monet'
- Weigela florida 'Big Love'
- Weigela florida 'Bristol Ruby'
- Weigela florida 'Carnaval'
- Weigela florida 'Cherry Love'
- Weigela florida 'Eva Rathke'
- Weigela florida 'Lucifer'
- Weigela florida 'Minor Black'
- Weigela florida 'Minuet'
- Weigela florida 'Monet'
- Weigela florida 'Nana Variegata'
- Weigela florida 'Purpurea'
- Weigela florida 'Red Prince'
- Weigela florida 'Styriaca'
- Weigela florida 'Variegata'
- Weigela hortensis
- Weigela praecox
- Welwitschia mirabilis
- Westringia Wynyabbie Gem
- Westringia fruticosa
- Wilsonara Kolibri
- Wisteria brachybotrys 'Okayama'
- Wisteria brachybotrys 'Shiro-kapitan'
- Wisteria brachybotrys 'Showa-beni'
- Wisteria floribunda
- Wisteria floribunda 'Alba'
- Wisteria floribunda 'Blue Dream'
- Wisteria floribunda 'Honbeni'
- Wisteria floribunda 'Longissima'
- Wisteria floribunda 'Multijuga'
- Wisteria floribunda 'Murasaki Noda'
- Wisteria floribunda 'Shiro Noda'
- Wisteria floribunda 'Violacea Plena'
- Wisteria frutescens 'Amethyst Falls'
- Wisteria frutescens 'Longwood Purple'
- Wisteria macrostachya 'Blue Moon'
- Wisteria sinensis
- Wisteria sinensis 'Nivea'
- Wisteria sinensis 'Texas Purple'
- Wittrockia superba
- Wollemia nobilis
- Woodwardia radicans
- Wrightia religiosa
- Wulfenia orientalis