''Rubus conanicutensis'' called the Conanicut Island blackberry, is a rare North American species of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

in the

rose family Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera. The name is derived from the type genus ''Rosa''. Among the most species-rich genera are '' Alchemilla'' (270), ''Sorbus ...

. It has been found only in the State of

Rhode Island Rhode Island (, like ''road'') is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it ...

in the northeastern United States; particularly, on its namesake island,

Conanicut Island Conanicut Island is the second-largest island in Narragansett Bay in the American state of Rhode Island. It is connected on the east to Newport on Aquidneck Island via the Claiborne Pell Bridge, commonly known as the Newport Bridge, and on t ...

] in

Narragansett Bay Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound covering , of which is in Rhode Island. The bay forms New England's largest estuary, which functions as an expansive natural harbor and includes a small archipelago. Sm ...

, which is part of the town of

Jamestown, Rhode Island Jamestown is a town in Newport County, Rhode Island in the United States. The population was 5,559 at the 2020 census. Jamestown is situated almost entirely on Conanicut Island, the second largest island in Narragansett Bay. It also includes the u ...

. The genetics of ''Rubus'' is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.Flora of North America, ''Rubus'' Linnaeus, 1754. Bramble
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References

conanicutensis Plants described in 1945 Flora of Rhode Island {{rubus-stub