Walking Fern
Wallflower
Wallrocket
Walnut
Wand Blazing Star
Warty Caltrop
Warty Panicgrass
Warty Spurge
Washington Hawthorn
Water Chestnut
Water Foxtail
Water Hemlock
Water Horsetail
Water Knotweed
Water Oak
Water Plantain
Water Sedge
Water Smartweed
Water Tupelo
Water-starwort
Water-willow
Waterclover
Watercress
Waterdropwort
Waterhorehound
Waterleaf
Waterlily
Watermeal
Watermilfoil
Waternymph
Waterparsnip
Waterplantain Spearwort
Watershield
Waterthyme
Waterweed
Wavy Hairgrass
Wavyleaf Aster
Waxflower Shinleaf
Waxweed
Waxyleaf Meadow-rue
Weak Rush
Weak Stellate Sedge
Weakstalk Bulrush
Wedgescale