Lemna gibba, the gibbous duckweed,Derived from the Latin, gibbus = hump, Merriam-Webster Online Dictionary swollen duckweed, or fat duckweed, is a species of Lemna (duckweed).

Utricularia gibba, commonly known as the humped bladderwort or floating bladderwort, is a small, mat-forming species of carnivorous aquatic bladderwort.