''Rubus adenocaulis'' 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 Province of

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...

in the eastern Canada. 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. Some studies have suggested that ''R. adenocaulis'' may have originated as a hybrid between '' R. allegheniensis'' and '' R. setosus.''Flora of North America, ''Rubus allegheniensis'' Porter, 1896. Allegheny or common blackberry, sow-teat berry, ronce des Alléghanys
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References

adenocaulis Plants described in 1940 Flora of Nova Scotia Flora without expected TNC conservation status {{Rubus-stub