Arnica pedunculata f. monocephala (Rydb.) Cockerell accepted as Arnica fulgens Pursh (original description)
Helianthus coloradensis f. sulphurea Cockerell (original description)
Helianthus parishii f. oliveri (A.Gray) Cockerell (original description)
Helianthus parishii var. coloradensis (Cockerell) Cockerell (original description)
Helianthus petiolaris var. integrifolius Cockerell (original description)
Heliomeris annuus (Jones) Cockerell (original description)
Heliomeris brevifolius (Wooton & Standl.) Cockerell (original description)
Heliomeris hispidus Cockerell. (original description)
Heliomeris hispidus (A.Gray) Cockerell (original description)
Heliomeris hispidus var. ciliatus (B.L.Rob. & Greenm.) Cockerell (original description)
Heliomeris longifolius Cockerell (original description)
Heliomeris nevadensis (A.Nelson) Cockerell accepted as Heliomeris multiflora var. nevadensis (A.Nelson) Yates (original description)
Heliomeris obscurus Cockerell (original description)
Heliomeris porteri (A.Gray) Cockerell accepted as Helianthus porteri (A.Gray) Pruski (original description)
Hymenopappus polycephalus Osterh. accepted as Hymenopappus filifolius var. polycephalus (Osterh.) B.L.Turner (original description)