Common names: W
- wake robin
- wall bellflower
- wall germander
- wallflower
- Wallich milk parsley
- Wallum bottlebrush
- walnut
- wandering heath
- waratah
- Warminster broom
- warted barberry
- warty barberry
- water apple
- water avens
- water betony
- water birch
- water figwort
- water horsetail
- water hyacinth
- water hyssop
- water jasmine
- water knotweed
- water lettuce
- water lily
- water mimosa
- water mint
- water pepper
- water pineapple
- water poppy
- water soldier
- Waterer laburnum
- waterlily
- waterlily dahlia
- watermelon nightshade
- wattle
- wavy heliotrope
- wavyleaf sea lavender
- wax currant
- wax myrtle
- wax plant
- wayfaring tree
- weaver's broom
- Webb's cineraria
- weed
- weeping bottlebrush
- weeping cherry
- weeping fig
- weeping forsythia
- weeping Himalayan cedar
- weeping indigo
- weeping lantana
- weeping silver lime
- weeping spruce
- weeping willow
- Welsh onion
- Welsh poppy
- West Indian lantana
- western arborvitae
- western azalea
- western marsh-orchid
- western mugwort
- western pearly everlasting
- western red cedar
- western service berry
- western skunk cabbage
- western tea myrtle
- western wallflower
- western white trillium
- western yew
- Weymouth pine
- wheat
- wheel tree
- white angel's trumpet
- white ash
- white asphodel
- white baneberry
- white blood lily
- white broom
- white bryony
- white butterbur
- white cabbage
- white campion
- white cedar
- white cinquefoil
- white clover
- white correa
- white corydalis
- white currant
- white dead nettle
- white Egyptian lotus
- white feather honey myrtle
- white fir
- white forsythia
- white gaura
- white henbane
- white leadtree
- white lupin
- white mignonette
- white mountain saxifrage
- white mulberry
- white mullein
- white mustard
- white peony
- white poplar
- white rain lily
- white rose
- white sage
- white sagebrush
- white sally wattle
- white skunk cabbage
- white snakeroot
- white spruce
- white squill
- white stonecrop
- white swallowwort
- white trillium
- white trumpet pitcher
- white valerian
- white veratrum
- white walnut
- white water lily
- white willow
- white wood aster
- white-flower navelwort
- white-flowered tansy
- white-fruited rowan
- white-margined pussytoes
- white-stemmed bramble
- whitebeam
- whitetop
- Whitey wood
- whitlow grass
- whorl flower
- whorled loosestrife
- whorled mint
- whorled sage
- whorled tickseed
- wichuraiana rose
- widow flower
- widow's tears
- wild balsam apple
- wild basil
- wild bean
- wild bergamot
- wild Canterbury bells
- wild carrot
- wild cherry
- wild chervil
- wild crab apple
- wild cucumber
- wild daffodil
- wild ginger
- wild gladiolus
- wild gooseberry
- wild hyssop
- wild leek
- wild lemon
- wild lentil
- wild marjoram
- wild mint
- wild pansy
- wild peanut
- wild petunia
- wild privet
- wild radish
- wild rosemary
- wild rue
- wild senna
- wild service tree
- wild strawberry
- wild sunhemp
- wild teasel
- wild thyme
- wild tulip
- wild yam
- William's rhododendron
- Williams lovegrass
- willmott winter hazel
- willow
- willow gentian
- willow herb
- Willow-leaved cotoneaster
- willow-leaved foxglove
- willow-leaved pear
- willowherb
- willowleaf sunflower
- Wilson's barberry
- Wilson's magnolia
- windflower
- window plant
- wineberry
- winged broom
- winged everlasting
- winged spindle
- winged-stem passion flower
- wingnut
- wingpod purslane
- wingstem
- winter aconite
- winter creeper
- winter cress
- winter hazel
- winter heath
- winter heather
- winter jasmine
- winter savory
- winter squash
- winter viburnum
- wintergreen barberry
- wintersweet
- wirewood
- wishbone flower
- wisteria
- witch alder
- witch hazel
- woad
- wolfberry
- Wollemi pine
- wood anemone
- wood betony
- wood calamint
- wood cranesbill
- wood fern
- wood forget-me-not
- wood garlic
- wood horsetail
- wood poppy
- wood rose
- wood rush
- wood sage
- wood spurge
- wood violet
- woodland figwort
- woodland germander
- woodland passion flower
- woodland sage
- woodland strawberry
- woodruff
- woody catchfly
- woody spurge
- woolly burdock
- woolly buttercup
- woolly dutchman's pipe
- woolly foxglove
- woolly grevillea
- woolly rhododendron
- woolly speedwell
- woolly thistle
- wormleaf stonecrop
- wormseed goosefoot
- Woronow's snowdrop
- wrinkled viburnum