Wall Hawkweed          

Wall-lettuce          

Wallflower          

Water Arum          

Water Birch      

Water Foxtail      

Water Hemlock          

Water Horsetail      

Water Knotweed      

Water Minerslettuce          

Water Mudwort          

Water Parsely          

Water Plantain          

Water Pygmyweed          

Water Sedge      

Water Smartweed          

Water Speedwell          

Water Whorlgrass          

Water-starwort          

Waterawlwort          

Waterbuttons          

Watercress          

Waterdropwort          

Waterhorehound          

Waterlily          

Watermilfoil          

Waternymph          

Waterparsnip          

Watershield          

Waterweed          

Wavy Hairgrass      

Weak Arctic Sedge          

Weak Saxifrage          

Weak Sedge          

Weaselsnout          

Wedgeleaf Primrose          

Wedgeleaf Saxifrage          

Wedgeleaf Willow          

Wedgescale          

Weeping Alkaligrass          

Weeping Willow      

Welsh Onion          

Western Arctic Shootingstar          

Western Bog Yellowcress