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DESCRIPTION:
Most species of wild blackberry, also called brambles, provide important
sources of food and cover for many birds and mammals. Four species,
however, are considered weeds. Two of these are non-natives, cutleaf
blackberry (Rubus laciniatus) and Himalaya blackberry (Rubus
discolor [=R. procerus]). In addition, two native species can
also be weeds under certain conditions. For example, thimbleberry
(Rubus parviflorus) competes with conifers during establishment
in reforested areas, and California blackberry (Rubus ursinus
[=R. vitifolius]) can infest areas adjacent to streams and
ditches. Of these weedy species, the most common, vigorous, and
troublesome is Himalaya blackberry. See the Wild
Blackberries Pest Note for more information on identification
and management.
Broadleaf
ID illustration
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