Carex viridula is in the
section Carex sect. Ceratocystis, a
circumboreal group with around six other species, although the taxonomy of this group is controversial, and up to 19 species have been recognized.
Flora of North America accepts the following three
subspecies and two
varieties of
Carex viridula: •
Carex viridula subsp.
brachyrrhyncha •
Carex viridula var.
elatior •
Carex viridula var.
saxilittoralis •
Carex viridula subsp.
oedocarpa •
Carex viridula subsp.
viridula There is also variety
Carex viridula var.
bergrothii (synonym
Carex bergrothii ).
Kew's
Plants of the World Online considers
Carex viridula a synonym of
Carex oederi, and accepts two varieties: •
Carex oederi var.
bergrothii •
Carex oederi var.
oederi ==Conservation status==