Specimen ID | Common Name | State | County | Locality | Year |
| Drainage name | Status |
234147
| monoecious hydrilla | MA | Barnstable | Long Pond, Centerville, Barnstable | 2001 |
01090002
| Cape Cod | established |
877707
| monoecious hydrilla | MA | Barnstable | Mystic Lake | 2010 |
01090002
| Cape Cod | established |
1690177
| clade C hydrilla | MA | Hampden | Connecticut River | 2020 |
01080205
| Outlet Connecticut River | established |
1633923
| clade C hydrilla | MA | Hampden | Connecticut River at Threemile Brook | 2018 |
01080205
| Outlet Connecticut River | established |
1633924
| clade C hydrilla | MA | Hampden | Connecticut River, downstream of Threemile Brook | 2018 |
01080205
| Outlet Connecticut River | established |
1687541
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687539
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687540
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687542
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687543
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687544
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687545
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1687546
| clade C hydrilla | MA | Hampden | Enfield CT to Holyoke Dam | 2018 |
01080205
| Outlet Connecticut River | established |
1698940
| monoecious hydrilla | MA | Middlesex | [No locality description provided] | 2021 |
01090001
| Charles | |
1698995
| monoecious hydrilla | MA | Middlesex | [No locality description provided] | 2021 |
01090001
| Charles | |
1687223
| monoecious hydrilla | MA | Middlesex | 60 Scotch Pine Road, Gerald Kroft's property | 2009 |
01090001
| Charles | unknown |
877709
| monoecious hydrilla | MA | Middlesex | Small backyard pond in Weston, MA | 2010 |
01090001
| Charles | established |
1687210
| monoecious hydrilla | MA | Middlesex | Small pond next to Muraco Elementary School, Winchester, MA. | 2021 |
01090001
| Charles | established |
1546956
| monoecious hydrilla | MA | Middlesex | superfund site north of Woburn, west of Reading | 2019 |
01090001
| Charles | established |
258001
| monoecious hydrilla | MA | Plymouth | Hobomock Pond | 2008 |
01090002
| Cape Cod | established |
877708
| monoecious hydrilla | MA | Plymouth | Three small ponds in Duxbury and Marshfield | 2009 |
01090002
| Cape Cod | established |
1340414
| monoecious hydrilla | MA | Worcester | South Meadow Pond, Clinton | 2010 |
01070004
| Nashua River | established |
1634131
| monoecious hydrilla | MA | Worcester | South Meadow Pond, Clinton | 2010 |
01070004
| Nashua River | established |