Wallflower
Wallrocket
Walnut
Warty Spurge
Water Birch
Water Foxtail
Water Hemlock
Water Horsetail
Water Knotweed
Water Mannagrass
Water Mudwort
Water Plantain
Water Ragwort
Water Sedge
Water Smartweed
Water Speedwell
Water Whorlgrass
Water-starwort
Waterclover
Watercress
Waterhorehound
Waterhyssop
Waterleaf
Waterlily
Watermeal
Watermilfoil
Waternymph
Waterparsnip
Watershield
Waterthread Pondweed
Waterweed
Waterwort
Wavyleaf Thistle
Wax Currant
Waxflower Shinleaf
Waxleaf Penstemon
Waxyleaf Meadow-rue
Webber Needlegrass
Wedgeleaf
Wedgeleaf Draba
Wedgescale
Weeping Alkaligrass
West Indian Nightshade
Western Brackenfern