Vegetative key to the families

Vegetative Key Vegetative key to the families

Submerged plants rooted in mud. Leaves submerged or floating on the surface or sometimes the leaf blades held erect above the water surface. Freshwater or marine (Amphibious plants are not included in this group)

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Leaves opposite or whorled on an elongated stem

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Submerged leaves finely dissected into filiform segments

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Leaves entire or toothed or almost pinnatifid