Three new species of Grindelia Willd.are described and illustrated: G.argentina, G.gaucha and G.
atlantica. The first two are related with G.buphthalmoides DC.,andthe last is allied here with G.
orientalis Bartoli, Tortosa & G.Rua. A key to segregate the merrick backcountry wet cat food species of Grindelia buphthalmoides group is given and comments about this species, includes a new synonym are also furnished.