Rubus severus
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''Rubus severus'' is an uncommon 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. It is found in eastern Canada (
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 ...
) and the northeastern and north-central United States (
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...
,
Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to ...
,
New Hampshire New Hampshire is a U.S. state, state in the New England region of the northeastern United States. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
,
Rhode Island Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
).Fernald, Merritt Lyndon 1931. A new blackberry from New Hampshire. Rhodora 33(388): 102–104
description in Latin, commentary in English
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. severus'' may have originated as a hybrid between '' R. setosus'' and '' R. flagellaris. ''Flora of North America, ''Rubus setosus'' Bigelow, 1824. Bristly blackberry, ronce sétuleuse
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References

severus Severus is the name of various historical and fictional figures, including: ;Emperors of the Roman empire *Septimius Severus (145–211), Roman emperor from 193 to 211 (rarely known as ''Severus I.'') *Severus Caracalla (188–217), Roman emperor f ...
Plants described in 1931 Flora of Nova Scotia Flora of the Northeastern United States Flora without expected TNC conservation status {{Rubus-stub