Wahiawa Bog Sandmat          

Walkers Manihot          

Warty Spurge          

Water Toothleaf          

Wavyleaf Noseburn          

Weak Spurge          

Wedge Leaf-flower          

Wedge Sandmat          

Wedgeleaf Spurge          

West Indian Croton          

West Indian Spurge          

Whitemargin Sandmat          

Wiggins Croton          

Wild Lime          

Wild Marrow          

Wild Oilnut          

Wilkes Acalypha          

Woodland Spurge          

Wormseed Sandmat          

Wrights Spurge