Walking Fern          

Wall Hawkweed          

Wallflower          

Wallrocket          

Wallrue          

Walnut          

Wand Mullein          

Warty Caltrop          

Warty Panicgrass          

Warty Spurge          

Washington Hawthorn      

Water Arum          

Water Foxtail      

Water Hemlock          

Water Hickory      

Water Horsetail      

Water Hyacinth          

Water Knotweed      

Water Locust      

Water Mint          

Water Oak      

Water Plantain          

Water Sedge      

Water Smartweed          

Water Speedwell          

Water Tupelo      

Water-starwort          

Water-willow          

Waterclover          

Watercress          

Waterhorehound          

Waterhyssop          

Waterleaf          

Waterlily          

Watermeal          

Watermelon          

Watermilfoil          

Waternymph          

Waterparsnip          

Waterplantain Spearwort          

Waterpurslane          

Watershield          

Waterthread Pondweed      

Waterweed