| County | Township | Location | Reference Title | Year | Citation |
| Hancock | Frenchboro | | A comparison of Marine and estuarine algal populations from downeast Maine and eight contiguous northwest Atlantic areas | 1986 | Mathieson, A.C., and C.J. Dawes. 2018. A comparison of Marine and estuarine algal populations from downeast Maine and eight contiguous northwest Atlantic areas. Rhodora 120A:310-380 |
| Cumberland | Harpswell | | An historical comparison of seaweed populations from Casco Bay, Maine | 1903 | Mathieson, A.C., E.J. Hehre, C.J. Dawes, and C.D. Neefus. 2008. An historical comparison of seaweed populations from Casco Bay, Maine. Rhodora 110(941):1-102 |
| Knox | Vinalhaven | Hurricane Island: located in the mid-central part of Penobscot Bay (44°02'N, 68°54.6'W), offshore from the southwesterly side of Vinalhaven Island and near Green Island; ~2930m of shoreline. | A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands | 1985 | Mathieson, A.C., E.J. Hehre, J. Hambrook, and J. Gerweck. 1996. A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands. Rhodora 98(896): 369-418 |
| Knox | Matinicus Isle Plantation | Wooden Ball Island: located within the south central (exposed) part of the Penobscot Bay (43°51.3'N, 68°49.05'W), offshore (S) from Vinalhaven Island and Isle Au Haut (SW), and near Matinicus and Ragged Islands; ~5560m of shoreline. Collections were made | A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands | 1985 | Mathieson, A.C., E.J. Hehre, J. Hambrook, and J. Gerweck. 1996. A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands. Rhodora 98(896): 369-418 |
| Hancock | Frenchboro | Long Island: located within Jericho Bay (44°07'N, 68°21.5'W), offshore (SE) from Swans Island and northeast from Isle Au Haut; ~ 16770m of shoreline. Collections were made on the NW side near Frenchboro. | A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands | 1986 | Mathieson, A.C., E.J. Hehre, J. Hambrook, and J. Gerweck. 1996. A comparison of insular seaweed floras from Penobscot Bay, Maine, and other northwest Atlantic islands. Rhodora 98(896): 369-418 |
| | | A checklist and distributional index of the benthic marine algae of the north Atlantic Ocean | 0 | South, G.R. and I. Tittley. 1986. A checklist and distributional index of the benthic marine algae of the north Atlantic Ocean. |