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)
Leaves opposite or whorled on an elongated stem
Leaves divided pinnately (Myriophyllum) Haloragaceae
Terrestrial plants, occasionally on mud. Petals present in female flowers
Petals flat or almost so, twisted in the bud Haloragodendron
Petals curved and hooded around the stamens, erect in the bud