Baltimora scolospermum Steetz accepted as Baltimora recta L. (original description)
Baltimora scolospermum var. panamensis Steetz accepted as Baltimora recta L. (original description)
Chrysanthellum integrifolium Steetz (original description)
Clibadium leiocarpum Steetz (original description)
Dialesta discolor var. polychaeta Steetz accepted as Pollalesta discolor (Kunth) Aristeg. (original description)
Eupatorium critonioides Steetz accepted as Critonia morifolia (Mill.) R.M.King & H.Rob. (original description)
Eupatorium elatum Steetz accepted as Ayapana elata (Steetz) R.M.King & H.Rob. (original description)
Eupatorium exiguum Klotzsch ex Steetz accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob. (original description)
Eupatorium iresinoides var. glabrescens Steetz accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob. (original description)
Eupatorium iresinoides var. villosum Steetz accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob. (original description)
Eupatorium schiedeanum var. capitatum Steetz accepted as Fleischmannia pycnocephala (Less.) R.M.King & H.Rob. (original description)
Eupatorium schiedeanum var. tomentosum Steetz accepted as Fleischmannia pratensis (Klatt) R.M.King & H.Rob. (original description)
Eupatorium stenolepis Steetz accepted as Chromolaena hirsuta (Hook. & Arn.) R.M.King & H.Rob. (original description)
Gymnopsis vulcanica Steetz accepted as Viguiera cordata (Hook. & Arn.) D'Arcy (original description)
Melanthera microphylla Steetz accepted as Melanthera angustifolia A.Rich. (original description)
Tuberostylis Steetz (original description)
Tuberostylis rhizophorae Steetz (original description)
Unxia digyna Steetz accepted as Delilia biflora (L.) Kuntze (original description)
Vernonia seemanniana Steetz accepted as Lepidaploa tortuosa (L.) H.Rob. (original description)