| County | Township | Location | Institution | Year | Month | Day |
| Washington | Machiasport | End of public road, Starboard | University of New Brunswick Fredericton (UNB(CEMAR)) | 2006 | 4 | 25 |
| York | York | Cape Neddick, southern ME | University of New Brunswick Fredericton (UNB(CEMAR)) | 2006 | 4 | 24 |
| Cumberland | Cape Elizabeth | Cape Elizabeth, near Portland | University of New Brunswick Fredericton (UNB(CEMAR)) | 2005 | 4 | 14 |
| York | Kittery | Kiss Lake Ledges, Appledore Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2003 | 6 | 22 |
| York | Kittery | Appledore Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2003 | 6 | |
| Washington | Cutler | Maine Public Lands just south of Holmes Cove, Cutler, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2001 | 6 | 6 |
| Hancock | Bar Harbor | Schooner Head, Bar harbor | University of Maine Herbaria (MAINE) | 2001 | 5 | 30 |
| Cumberland | Long Island | Andrew's Nubble, Casco Bay, Long Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 5 | 13 |
| Cumberland | Long Island | Long Island, Casco Bay, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 5 | 13 |
| Cumberland | Chebeague Island | Eastern End Point, Casco Bay, Chebeague Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 5 | 6 |
| Cumberland | Portland | Cliff Island, at Bluffs, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 4 | 15 |
| Cumberland | Portland | Peaks Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 3 | 25 |
| Cumberland | Portland | Spar Cove, Peaks Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 3 | 25 |
| Knox | Saint George | Marshall Point Light, near Port Clyde, St. George, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 3 | 16 |
| Sagadahoc | Georgetown | Reid State Park, Georgetown, ME | University of New Hampshire - Macroalgal Collection (NHA) | 2000 | 3 | 11 |
| Sagadahoc | Phippsburg | Carrying Place Road and near Burnt Cove Island, Sebasco Harbor, Phippsburg, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1999 | 12 | 17 |
| York | Kittery | mouth of Brave Boat Harbor Marsh on the south (Kittery) shoreline, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1999 | 3 | 24 |
| Lincoln | Bristol | Rachel Carson Salt Pond Preserve, Chamberlain, Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1998 | 4 | 11 |
| Cumberland | Cape Elizabeth | Cape Elizabeth Light, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 4 | 28 |
| Cumberland | Cape Elizabeth | Cape Elizabeth Light, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 4 | 12 |
| Cumberland | Cape Elizabeth | Portland Head Light, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 4 | 12 |
| York | Kennebunk | Parsons Beach, Kennebunk, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1997 | 4 | 7 |
| Lincoln | South Bristol | just south of Christmas Cove and off Sand Cove Road, at Johns Bay and near mouth of Damariscotta River, South Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 5 | 18 |
| Lincoln | South Bristol | south of Christmas Cove, Johns Bay and Damariscotta River, South Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 5 | 18 |
| Hancock | Bar Harbor | Thunder Hole, Bar Harbor, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 5 | 5 |
| Hancock | Bar Harbor | Otter Point, Mount Desert Island, Bar Harbor, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 5 | 5 |
| Washington | Milbridge | Narraguagus River at end of Fickett Point Road, Milbridge, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 18 |
| Washington | Robbinston | St. Croix River at Robinston boat ramp and picnic area, Robbinston, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 18 |
| Hancock | Lamoine | Lamoine State Park, Lamoine, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 16 |
| York | Ogunquit | Ogunquit Beach, Ogunquit, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 5 |
| York | Ogunquit | Ogunquit River at town ramp, Ogunquit, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 5 |
| York | Kennebunkport | inside of breakwater, Cape Arundel, Kennebunkport, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 4 | 2 |
| Cumberland | Portland | Peaks Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 3 | 23 |
| Cumberland | Portland | Diamond Cove, Great Diamond Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 3 | 17 |
| Knox | Vinalhaven | Lanes Island Preserve, Penobscot Bay, Vinalhaven, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 3 | 14 |
| York | Kittery | Seapoint, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1996 | 2 | 14 |
| Sagadahoc | Phippsburg | Reid Beach, Phippsburg, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 6 | 10 |
| Lincoln | Boothbay | tidal pond, East Boothbay, Boothbay, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 19 |
| Cumberland | South Portland | Fore River, South Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 19 |
| Cumberland | Cape Elizabeth | Two Lights State Park, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 18 |
| Cumberland | Long Island | Andrew's Nubble, Casco Bay, Long Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 14 |
| Cumberland | Scarborough | Higgins Beach, Scarborough, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 6 |
| Cumberland | Cape Elizabeth | Kettle Cove, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 6 |
| York | Saco | "Bay View" rock outcrop near Ferr Beach State Park, Saco, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 5 |
| York | Saco | Camp Ellis, mouth of the Saco River, Saco, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 5 |
| Cumberland | Scarborough | Pine Point, Scarborough, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 5 |
| York | York | East Point, near Stage Neck, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 4 |
| York | Ogunquit | Perkins Cove, Ogunquit, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 4 |
| York | Saco | Ferry Beach State Park, Saco, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 3 |
| York | Old Orchard Beach | Googin's Rock near Ocean Park, Old Orchard Beach, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 3 |
| York | Old Orchard Beach | Goose Fare Brook, Old Orchard Beach, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 3 |
| York | Kittery | Seapoint Beach, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 2 |
| York | Wells | bridge/culvert area on Webhannet Marsh, Drake Island Road, Wells, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 1 |
| York | Wells | i.e. just north of Webhannet River breakwater, Drake Island Beach, Wells, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 1 |
| York | Kennebunk | Parsons Beach, near the mouth of the Mousam River, Kennebunk, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 5 | 1 |
| Sagadahoc | Georgetown | Reid State Park, Georgetown, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 26 |
| York | York | Barn Point, near the entrance to Cape Neddick River (Harbor), York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 23 |
| York | Wells | mouth of the Webhannet River at breakwater, Wells, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 23 |
| York | Ogunquit | Ogunquit Beach, Ogunquit, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 23 |
| Cumberland | Portland | Davey's Elm Cove, Peaks Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 22 |
| Cumberland | Portland | Whaleback, Peaks Island, Casco Bay, Portland, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 22 |
| Hancock | Sullivan | Sullivan Falls, near Rt. 1, Hancock (Sullivan), ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 18 |
| Lincoln | Boothbay | at a "marine dam" formed by a tidal dam near the East Boothbay Post Office Building, East Boothbay, Boothbay, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 18 |
| Lincoln | Boothbay | Ocean Point, Boothbay, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 18 |
| Washington | Harrington | Ripley Neck, Ripley, opposite Hen Island, Harrington, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 17 |
| Washington | Steuben | Petit Manan National Wildlife Refuge, Steuben, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 16 |
| Hancock | Bar Harbor | Sand Beach, just before Thunder Hole, Bar Harbor, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 16 |
| Hancock | Southwest Harbor | Seawall, near campground, Southwest Harbor, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 16 |
| Hancock | Blue Hill | Blue Hill Falls, off of Rt. 175, Blue Hill, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 15 |
| Hancock | Deer Isle | Gray Cove, Deer Isle, Deer Isle, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 15 |
| Lincoln | Bristol | Pemaquid Point, Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 12 |
| York | Wells | Moody Point, Wells, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 9 |
| York | Wells | mouth of Webhannet River, Wells, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 9 |
| York | Biddeford | Biddeford Pool, at end of Fourth Street and opposite an old Coast Guard facility, Biddeford, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 8 |
| York | Kennebunkport | Cape Arundel, near the mouth of the Kennebunk River, Kennebunkport, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 8 |
| Hancock | Bar Harbor | town pier at Bar Harbor, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 3 |
| Hancock | Sorrento | Eastern Point, near (opposite) Preble Island, Sorrento, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 4 | 1 |
| Sagadahoc | Phippsburg | Head Beach, Phippsburg, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 3 | 28 |
| Hancock | Mount Desert | Bracy Cove, town of Mount Desert, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 3 | 25 |
| Cumberland | Cape Elizabeth | Fort Williams / Portland Head Light, Cape Elizabeth, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 3 | 25 |
| Hancock | Blue Hill | Blue Hill Falls at Rt. 175, beyond the retaining wall with a narrow opening to Salt Pond , Blue Hill, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1995 | 3 | 4 |
| Lincoln | South Bristol | Rt. 129 near Cove Side Marina and Restaurant, Damariscotta River, just upstream from Christmas Cove, South Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 6 | 18 |
| Lincoln | South Bristol | tip of South Bristol Peninsula, Damariscotta River, South Bristol, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 6 | 15 |
| Hancock | Bar Harbor | Otter Point, Bar Harbor, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1994 | 4 | 14 |
| Knox | Vinalhaven | Hurricane Island, Vinalhaven, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1986 | 6 | 11 |
| Knox | Matinicus Isle Plantation | Wooden Ball Island, sheltered side, north west 340 degrees, Matinicus Isle, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1986 | 6 | 9 |
| Hancock | Frenchboro | abundant tidal pools- beautiful,=exposed site, Penobscot Bay, Frenchboro, Long Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1986 | 6 | 7 |
| Hancock | Frenchboro | abundant tidal pools- beautiful, Penobscot Bay, Frenchboro, Long Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1986 | 6 | 7 |
| Hancock | Frenchboro | Long Island, Frenchboro, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1986 | 6 | 6 |
| Hancock | Swans Island | low intertidal zone, Bauxam Cove, Marshall Island, Casco Bay, Swan's Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1985 | 6 | 6 |
| Knox | Matinicus Isle Plantation | Wooden Ball Island, Matinicus Isle, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1985 | 6 | 2 |
| York | Kittery | attched to Chondrus crispus in tide pool, Smuttynose Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1985 | 5 | 4 |
| York | Kittery | intertidal, Appledore Island, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1985 | 4 | 13 |
| York | Ogunquit | Perkins Cove, Ogunquit, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1978 | 5 | 5 |
| York | Kittery | Malaga Island, southeast side of Isles of Shoals, SCUBA, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1977 | 5 | 27 |
| York | Kittery | low intertidal zone, Duck Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1977 | 5 | 27 |
| York | Kittery | low intertidal zone, Cedar Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1977 | 5 | 27 |
| York | Kittery | Appledore Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1977 | 5 | 13 |
| York | Kittery | Malaga Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1977 | 5 | 2 |
| York | York | upper subtidal zone, Boon Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 6 | 30 |
| York | Kittery | low intertidal zone, Smuttynose Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| York | Kittery | mid intertidal zone, Smuttynose Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| York | Kittery | Appledore Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| York | Kittery | Duck Island, SCUBA, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| York | Kittery | low intertidal zone, Malaga Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| York | Kittery | low intertidal zone, Cedar Island, Isles of Shoals, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1976 | 4 | 16 |
| Sagadahoc | Georgetown | Reid State Park, Georgetown, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1975 | 4 | 12 |
| Hancock | Bar Harbor | Western Point, Blackwoods Park, Mount Desert Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1971 | 5 | 15 |
| York | York | Bald Head Cliff, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1968 | 5 | 13 |
| York | York | Bald Head Cliff, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1968 | 5 | 6 |
| York | York | Bald Head Cliff, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1968 | 4 | 19 |
| York | Kittery | Seapoint, Kittery, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1968 | 3 | 23 |
| Washington | East Machias | East Machias, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 5 | 26 |
| Washington | East Machias | East Machias, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 5 | 22 |
| Washington | Lubec | West Quoddy Head, Lubec, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 5 | 21 |
| York | York | Nubble Point Lighthouse, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 5 | 4 |
| York | Kittery | Seapoint, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 4 | 27 |
| York | York | Bald Head Cliff, York, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 4 | 7 |
| Cumberland | Scarborough | Prout's Neck, Scarborough, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1966 | 3 | 12 |
| Knox | Isle au Haut | Eastern side of Isle au Haut | University of Maine Herbaria (MAINE) | 1961 | 7 | 16 |
| Cumberland | Unknown | Cumberland County, Maine [no other location details given] | Field Museum of Natural History (F) | 1905 | 7 | |
| Cumberland | Harpswell | Harpswell, Maine | Field Museum of Natural History (F) | 1905 | 7 | |
| Cumberland | Harpswell | Harpswell | Field Museum of Natural History (F) | 1905 | 7 | |
| Cumberland | Harpswell | Harpswell | The New York Botanical Garden (NY) | 1905 | 7 | |
| Cumberland | Harpswell | Harpswell, Maine | The New York Botanical Garden (NY) | 1905 | 7 | |
| Cumberland | Harpswell | Harpswell | University Herbarium, University of California, Berkeley (UC) | 1905 | 7 | |
| Cumberland | Harpswell | Casco Bay, Inner Mark Island | The New York Botanical Garden (NY) | 1904 | 6 | 18 |
| Cumberland | Unknown | Inner Marsh Island, Casco bay | Field Museum of Natural History (F) | 1904 | 6 | 18 |
| Lincoln | Southport | Squirrel Island, Southport Island, ME | University of New Hampshire - Macroalgal Collection (NHA) | 1900 | | |