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)
Either; leaves alternate on an elongated stem (sometimes opposite when subtending flowers); or, leaves tufted on a short stem or arising from a rhizome
Leaves pinnately divided
Leaf segments filiform (Myriophyllum) Haloragaceae
Leaf segments flat (Rorippa) Brassicaceae