Rubus exsularis

Rubus exsularis, the fenceline dewberry,^[1] is a rare North American species of flowering plant in the rose family. It has been found in the northeastern and north-central United States, primarily in the Appalachian Mountains from New York to Kentucky, with a few isolated populations in southeastern Wisconsin.^[2][3]

Rubus exsularis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Rosaceae
Genus:	Rubus
Species:	R. exsularis
Binomial name
Rubus exsularis L.H.Bailey 1943

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.^[4]