Vegetative key to the families
Vegetative Key Vegetative key to the families
FREE FLOATING WATER PLANTS; roots, when present, not rooted in the mud. (Note: there are 2 genera of ferns which are free floating, see Azolla and Salvinia)
Whole plant not exceeding 5 mm long Lemnaceae
Plant up to 50 cm high. Petioles swollen and spongy Pontederiaceae