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Water Cabbage
- pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
- pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
Water Flaxseed
- cosmopolitan except South America and New Zealand and some oceanic islands
- cosmopolitan except South America and New Zealand and some oceanic islands
Wolffia
- minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond
Watermeal
- any of various aquatic plants of the genus Wolffia; throughout warmer regions of the world
Watermeals
- any of various aquatic plants of the genus Wolffia; throughout warmer regions of the world
Wolffia Columbiana
- smallest flowering plants known; of the Americas
Wolffiella
- minute rootless aquatic herbs having flat fronds floating on or below the water surface and bearing 1-2 flowers per frond; America and Africa
Wolffiella Gladiata
- having narrow flat sickle-shaped submerged fronds; North America
Wild Sarsaparilla
- common perennial herb having aromatic roots used as a substitute for sarsaparilla; central and eastern North America
- common perennial herb having aromatic roots used as a substitute for sarsaparilla; central and eastern North America
Wild Sarsparilla
- common perennial herb having aromatic roots used as a substitute for sarsaparilla; central and eastern North America
- common perennial herb having aromatic roots used as a substitute for sarsaparilla; central and eastern North America