Echinacea pallida var. sanguinea (Nutt.) Gandhi & R.D.Thomas accepted as Echinacea sanguinea Nutt. (original description)
Heliopsis helianthoides var. gracilis (Nutt.) Gandhi & R.D.Thomas accepted as Heliopsis gracilis Nutt. (original description)
Heterotheca graminifolia var. tenuifolia (Torr.) Gandhi & R.D.Thomas accepted as Pityopsis graminifolia var. tenuifolia (Torr.) Semple & F.D.Bowers (original description)
Heterotheca subaxillaris var. latifolia (Buckley) Gandhi & R.D.Thomas accepted as Heterotheca subaxillaris subsp. latifolia (Buckley) Semple (original description)
Hymenopappus scabiosaeus var. artemisiifolia (DC.) Gandhi & R.D.Thomas (original description)
Hymenopappus scabiosaeus var. artemisiifolius (DC.) Gandhi & R.D.Thomas accepted as Hymenopappus artemisiifolius var. artemisiifolius DC. (original description)
Marshallia tenuifolia var. graminifolia (Walter) Gandhi & R.D.Thomas accepted as Vernonia angustifolia Michx. (original description)