Arnica lonchophylla var. arnoglossa (Greene) B.Boivin accepted as Arnica lonchophylla Greene (original description)
Bidens cernua var. dentata (Nutt.) B.Boivin accepted as Bidens campylotheca subsp. pentamera (Sherff) Ganders & Nagata (original description)
Crepis atribarba var. cytotaxonomicorum B.Boivin (original description)
Crepis runcinata var. glauca (Nutt.) accepted as Crepis runcinata subsp. glauca (Nutt.) Babc. & Stebbins (original description)
Gaillardia aristata f. monochroma B.Boivin accepted as Gaillardia aristata Pursh (original description)
Gnaphalium radians var. ustulatum (Nutt.) B.Boivin accepted as Gnaphalium ustulatum Nutt. (original description)
Helenium autumnale var. fylesii B.Boivin accepted as Helenium autumnale L. (original description)
Helianthus annuus f. fallax B.Boivin (original description)
Helianthus annuus f. lenticularis (Douglas ex Douglas) B.Boivin accepted as Helianthus annuus L. (original description)
Helianthus subtuberosus f. verticillatus (Lakela) (original description)
Helianthus subtuberosus var. rydbergii (Britton) B.Boivin (original description)
Hieracium fassettii Lepage (original description)
Hieracium grohii Lepage (original description)
Hieracium scabriusculum f. chrysostylum Lepage (original description)
Hieracium scabriusculum f. phaeostylum Lepage (original description)
Hieracium scabriusculum f. xanthostylum Lepage (original description)
Hieracium scabriusculum var. saximontanum Lepage accepted as Hieracium umbellatum L. (original description)
Hieracium scabriusculum var. scabrum (Schwein.) Lepage accepted as Hieracium umbellatum L. (original description)