Western waterweed, Nuttall's waterweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 12,267
Canadian Waterweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 6,360
Frogbit
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 1,205
Oxygen-weed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 363
Water-soldier
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 342
Elodea densa
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 120
Holly-leaved naiad
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 70