Plants voted as: POTENTIALLY INVASIVE
invasive plants" are non-native
species not currently known to be naturalized
in Massachusetts, but that can be expected
to become invasive within minimally
managed habitats within the Commonwealth. As defined here, "species" includes
all synonyms, subspecies, varieties,
forms, and cultivars of that species
unless proven otherwise by a process
of scientific evaluation.
Arthraxon hispidus (Thunb.) Makino (Hairy
joint grass; jointhead; small carpetgrass)
annual grass historically known from
Franklin County but not currently known
from the state.
Habitats elsewhere include roadsides,
shores, ditches, and low woods and fields. Grows in full to partial shade. Is problematic in Connecticut and southward.
Carex kobomugi Ohwi (Japanese sedge; Asiatic sand sedge)
perennial sedge established mainly in
sand dunes and growing in full sun. There is only one current New England location--in
Rhode Island; it can spread rapidly
in dune systems.
(Rupr.) Herder (Amur
shrub having specimens and reports from
a number of MA counties, but verification
of naturalization at these locations
is needed. The likely habitats are woods and woodland
Can grow in full sun or shade.
Escapes from cultivation, but
documentation needed regarding naturalized
populations in MA; recognized as invasive
in the Midwest and portions of the southeastern
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