Ageratum chortianum Standl. & Steyerm. (original description)
Aster bimater Standl. & Steyerm. accepted as Symphyotrichum trilineatum (Sch.Bip. ex Klatt) G.L.Nesom (original description)
Cacalia guatemalensis Standl. & Steyerm. accepted as Psacalium guatemalense (Standl. & Steyerm.) Cuatrec. (original description)
Cacalia pinetorum Standl. & Steyerm. accepted as Psacalium pinetorum (Standl. & Steyerm.) Cuatrec. (original description)
Cacalia pudica Standl. & Steyerm. accepted as Senecio nubivagus L.O.Williams (original description)
Calea crassifolia Standl. & Steyerm. (original description)
Calea savannarum Standl. & Steyerm. accepted as Acmella uliginosa (Sw.) Cass. (original description)
Cirsium nigriceps Standl. & Steyerm. (original description)
Erechtites agrestis (Sw.) Standl. & Steyerm. accepted as Erechtites hieraciifolius (L.) Raf. ex DC. (original description)
Eupatorium crocodilium Standl. & Steyerm. accepted as Fleischmannia crocodilia (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium cupressorum Standl. & Steyerm. accepted as Piptothrix areolaris (DC.) R.M.King & H.Rob. (original description)
Eupatorium jejunum Standl. & Steyerm. accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob. (original description)
Eupatorium macrum Standl. & Steyerm. accepted as Condylidium iresinoides (Kunth) R.M.King & H.Rob. (original description)
Eupatorium mendax Standl. & Steyerm. accepted as Fleischmanniopsis mendax (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium mimicum Standl. & Steyerm. accepted as Koanophyllon mimica (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium montigenum Standl. & Steyerm. accepted as Bartlettina montigena (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium plethadenium Standl. & Steyerm. accepted as Ageratina plethadenia (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium rojasianum Standl. & Steyerm. accepted as Fleischmannia pleurocephala (Less.) R.M.King & H.Rob. (original description)
Eupatorium salinum Standl. & Steyerm. accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob. (original description)
Eupatorium saxorum Standl. & Steyerm. accepted as Fleischmannia saxorum (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Eupatorium vetularum Standl. & Steyerm. accepted as Ageratina caeciliae (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium zunilanum Standl. & Steyerm. accepted as Ageratina zunilana (Standl. & Steyerm.) R.M.King & H.Rob. (original description)
Gnaphalium standleyi Steyerm. accepted as Pseudognaphalium standleyi (Steyerm.) G.L.Nesom (original description)
Hidalgoa pentamera Sherff accepted as Hidalgoa ternata La Llave (original description)
Hidalgoa steyermarkii Sherff accepted as Hidalgoa ternata La Llave (original description)
Hieracium clivorum Standl. & Steyerm. (original description)
Hieracium culmenicola Standl. & Steyerm. accepted as Hieracium guatemalense Standl. & Steyerm. (original description)
Hieracium guatemalense Standl. & Steyerm. (original description)
Hieracium jalapense Standl. & Steyerm. accepted as Hieracium irasuense Benth. (original description)
Hieracium ostreophyllum Standl. & Steyerm. accepted as Hieracium fendleri var. ostreophyllum (Standl. & Steyerm.) B.L.Turner (original description)
Hieracium tacanense Standl. & Steyerm. accepted as Hieracium irasuense Benth. (original description)
Jungia guatemalensis Standl. & Steyerm. accepted as Jungia ferruginea L.f. (original description)
Liabum tajumulcense Standl. & Steyerm. accepted as Sinclairia tajumulcensis (Standl. & Steyerm.) H.Rob. & Brettell (original description)
Mikania concinna Standl. & Steyerm. (original description)
Mikania guatemalensis Standl. & Steyerm. accepted as Mikania houstoniana (L.) B.L.Rob. (original description)
Mikania huitzensis Standl. & Steyerm. accepted as Mikania cordifolia (L.f.) Willd. (original description)
Mikania petrina Standl. & Steyerm. (original description)
Pectis flava Standl. & Steyerm. accepted as Pectis uniaristata var. holostemma A.Gray (original description)
Perymenium inamoenum (Standl.) Standl. & Steyerm. accepted as Perymenium ghiesbreghtii B.L.Rob. & Greenm. (original description)
Perymenium jalapanum Standl. & Steyerm. (original description)
Polymnia standleyi Steyerm. accepted as Rumfordia guatemalensis (J.M.Coult.) S.F.Blake (original description)
Polymnia verapazensis Standl. & Steyerm. accepted as Rumfordia guatemalensis (J.M.Coult.) S.F.Blake (original description)
Rumfordia standleyi (Steyerm.) Standl. & Steyerm. accepted as Rumfordia guatemalensis (J.M.Coult.) S.F.Blake (original description)
Salmea orthocephala Standl. & Steyerm. (original description)
Salmea pubescens (S.F.Blake) Standl. & Steyerm. accepted as Salmea scandens (L.) DC. (original description)
Scalesia menziesii (Degener & Sherff) accepted as Scalesia affinis Hook.f. (original description)
Scalesia menziesii (O.Deg. & Sherff) O.Deg. & Sherff (original description)
Schaetzellia standleyi Steyerm. accepted as Macvaughiella mexicana (Sch.Bip.) R.M.King & H.Rob. (original description)
Sigesbeckia nudicaulis Standl. & Steyerm. (original description)
Stevia chortiana Standl. & Steyerm. accepted as Stevia deltoidea Greene (original description)
Stevia vulcanicola Standl. & Steyerm. accepted as Stevia microchaeta Sch.Bip. ex Sch.Bip. (original description)
Tagetes sororia Standl. & Steyerm. accepted as Tagetes nelsonii Greenm. (original description)
Trixis amphimalaca Standl. & Steyerm. accepted as Trixis nelsonii Greenm. (original description)
Verbesina apleura var. foliolata Standl. & Steyerm. accepted as Verbesina apleura S.F.Blake (original description)
Verbesina calciphila Standl. & Steyerm. (original description)
Verbesina guatemalensis var. glabrata Standl. & Steyerm. accepted as Verbesina guatemalensis B.L.Rob. & Greenm. (original description)
Vernonia medialis Standl. & Steyerm. accepted as Lepidaploa canescens (Kunth) H.Rob. (original description)
Vernonia mima Standl. & Steyerm. (original description)
Zexmenia phyllocephala (Hemsl.) Standl. & Steyerm. (original description)