Kyrstenia ageratifolia (DC.) Greene accepted as Ageratina havanensis (Kunth) R.M.King & H.Rob. (original description)
Kyrstenia bellidifolia (Benth.) Greene accepted as Ageratina bellidifolia (Benth.) R.M.King & H.Rob. (original description)
Kyrstenia benthami (Klatt) Greene accepted as Bartlettina macrocephala (Benth.) R.M.King & H.Rob. (original description)
Kyrstenia brevipes (DC.) Greene accepted as Ageratina brevipes (DC.) R.M.King & H.Rob. (original description)
Kyrstenia calaminthaefolia (Kunth) Greene accepted as Ageratina calaminthaefolia (Kunth) R.M.King & H.Rob. (original description)
Kyrstenia ciliata (Less.) Greene accepted as Ageratina ciliata (Less.) R.M.King & H.Rob. (original description)
Kyrstenia deltoidea (Jacq.) Greene accepted as Ageratina deltoidea (Jacq.) R.M.King & H.Rob. (original description)
Kyrstenia donnell-smithii (Coult.) Greene accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob. (original description)
Kyrstenia espinosarum (A.Gray) Greene accepted as Ageratina espinosarum (A.Gray) R.M.King & H.Rob. (original description)
Kyrstenia grandidentata (DC.) Greene accepted as Ageratina pazcuarensis (Kunth) R.M.King & H.Rob. (original description)
Kyrstenia guadalupensis (Spreng.) Greene accepted as Fleischmannia microstemon (Cass.) R.M.King & H.Rob. (original description)
Kyrstenia occidentalis (Hook.) Greene accepted as Ageratina occidentalis (Hook.) R.M.King & H.Rob. (original description)
Kyrstenia thyrsiflora Greene accepted as Ageratina thyrsiflora (Greene) R.M.King & H.Rob. (original description)