Encelia chaseae Millsp. ex Millsp. & Chase (original description)
Parthenium schottii Greenm. (original description)
Parthenium schottii Greenm. ex Millsp. & Chase (original description)
Pectis schottii (Fernald) Millsp. & Chase accepted as Pectis linearis La Llave (original description)
Plagiolophus Greenm. (original description)
Plagiolophus millspaughii Greenm. ex Greenm. (original description)
Salmea curviflora var. glabrata (J.M.Coult.) Greenm. accepted as Otopappus glabratus (J.M.Coult.) S.F.Blake (original description)
Salmea gaumeri Greenm. accepted as Otopappus guatemalensis (Urb.) R.L.Hartm. & Stuessy (original description)
Salmea gaumeri Greenm. ex Millsp. & Chase (original description)
Zexmenia hispida var. ramosissima Greenm. ex Millsp. & Chase (original description)