All Species in Wolffia
- Asian Watermeal (Wolffia globosa)
- Brazilian Watermeal (Wolffia brasiliensis)
- Columbian Watermeal (Wolffia columbiana)
- Northern Watermeal (Wolffia borealis)
- Spotless Watermeal (Wolffia arrhiza)
- Wolffia angusta (Wolffia angusta)
- Wolffia australiana (Wolffia australiana)
- Wolffia cylindracea (Wolffia cylindracea)
- Wolffia elongata (Wolffia elongata)
- Wolffia microscopica (Wolffia microscopica)
- Wolffia neglecta (Wolffia neglecta)