Calea acuminata Standl. & L.O.Williams accepted as Calea ternifolia Kunth (original description)
Calea acuminata var. xanthactis Standl. & L.O.Williams accepted as Calea ternifolia Kunth (original description)
Calea zacatechichi var. laevigata Standl. & L.O.Williams accepted as Calea ternifolia Kunth (original description)
Calea zacatechichi var. xanthina Standl. & L.O.Williams accepted as Calea ternifolia Kunth (original description)
Eupatorium reticuliferum Standl. & L.O.Williams accepted as Ageratina reticulifera (Standl. & L.O.Williams) R.M.King & H.Rob. (original description)
Eupatorium ruae Standl. accepted as Bartlettina pansamalensis (B.L.Rob.) R.M.King & H.Rob. (original description)
Pterocaulon pompilianum Standl. & L.O.Williams accepted as Pterocaulon virgatum (L.) DC. (original description)
Senecio bartlettii Greenm. (original description)
Senecio cobanensis var. sublaciniatus Greenm. accepted as Senecio cobanensis J.M.Coult. (original description)
Senecio lithophilus Greenm. (original description)
Senecio morazensis Greenm. accepted as Pentacalia morazensis (Greenm.) H.Rob. & Cuatrec. (original description)
Senecio steyermarkii Greenm. (original description)
Stevia williamsii Standl. accepted as Stevia tephrophylla S.F.Blake (original description)
Zexmenia ligulifolia Standl. & L.O.Williams accepted as Wedelia ligulifolia (Standl. & L.O.Williams) Strother (original description)
Zexmenia valerii Standl. & Steyerm. (original description)
Zexmenia williamsii Standl. & Steyerm. accepted as Wamalchitamia williamsii (Standl. & Steyerm.) Strother (original description)