| County | Township | Location | Institution | Year | Month | Day |
| York | Kittery | Brave Boat Harbor, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2015 | 10 | 10 |
| Cumberland | Freeport | Brewer South Freeport Marine, South Freeport, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2010 | 7 | 31 |
| Cumberland | South Portland | Spring Point Marina, South Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2010 | 7 | 31 |
| Knox | Camden | Wayfarer Marina, 59 Sea Street, Camden, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2007 | 7 | 29 |
| Knox | Thomaston | St. George River at Boat Ramp, Thomaston, ME; 44.07171 -69.182424 | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 8 | 2 |
| Lincoln | Alna | Sheepscot River at Sheepscot Road and Dyer Neck Road, Alna, ME; 44.050361 -69.610404 | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 7 | 18 |
| Lincoln | Newcastle | Reversing Falls, Sheepscot River, Newcastle, ME; 44.048622 -69.615212 | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 6 | 19 |
| Sagadahoc | Arrowsic | Sasanoa River, on Arrowsic Island opposite Flying Point (i.e. off Old Stage Road), Arrowsic, ME; 43.882103 -69.765488 | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 6 | 19 |
| Waldo | Belfast | City Point, Passagassawakeag River, Belfast, ME; 44.449419 -69.033891 | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 5 | 4 |
| Lincoln | Wiscasset | a submerged "ledge" offshore from the waterfront at the Chewonki Campground, Chewonki Neck, Montsweag Bay, Wiscasset, ME; 43.954 -69.72146 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 26 |
| Lincoln | Wiscasset | on the Chewonki Campground Waterfront up to Hoyt's Point, Back River (Sheepscot), Wiscasset, ME; 43.954641 -69.719229 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 26 |
| Knox | Warren | Route 1 Bridge on St. George River, South Warren, ME; 44.078396 -69.218867 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 16 |
| Knox | Warren | Brooklyn Bridge on St. George River, just above the dichotomy of the Mill River, Warren, ME; 44.07154 -69.188106 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 6 |
| Cumberland | Freeport | Cousins River, at Route 1 bridge, South Freeport, ME; 43.812486 -70.153617 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 6 |
| Cumberland | Freeport | near the tidal headwaters of the Cousins River (i.e. at Webster and Old Country Roads), South Freeport, Freeport, ME; 43.829205 -70.145939 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 8 | 6 |
| Cumberland | Scarborough | Black Point Road, just up from Highland Avenue and Route 207 bridge, Scarborough, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 7 | 24 |
| Lincoln | Newcastle | Reversing Falls area, Sheepscot River, off of Sheepscot Cross Road, Newcastle, ME; 44.048622 -69.615212 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 7 | 14 |
| York | Kennebunkport | Kennebunk River, at Durrel's Bridge between Route 35 and Old River Road, Kennebunk, ME; 43.378779 -70.505093 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 7 | 11 |
| York | Kennebunk | Mousam River at Route 9, Kennebunk, ME; 43.351504 -70.518157 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 7 | 11 |
| York | Biddeford | Public Boat Launching Ramp off of Routes 208/9, Saco River, Biddeford, ME; 43.474306 -70.409636 | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 6 | 28 |
| York | York | York River Estuary #16, York, ME; 43.137666 -70.676584 | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 12 | 14 |
| York | York | York River Estuary, # 20 intertidal, York, ME; 43.131782 -70.647058 | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 12 | 14 |
| York | York | York River Estuary, # 20 intertidal, York, ME; 43.131782 -70.647058; 43.131782 -70.647058 | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 12 | 14 |
| York | York | York River Estuary, # 7 intertidal, York, ME; 43.131782 -70.647058 | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 12 | 14 |
| York | York | York River Estuary, #20, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 12 | 14 |
| York | York | York River Estuary, ME #4, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1984 | 11 | 30 |
| York | York | South Bank of York River at Rices Bridge on Route 1, Site 14, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1978 | 6 | 16 |