Ambrosia chamissonis f. bipinnatisecta (Less.) B.Boivin accepted as Ambrosia chamissonis (Less.) Greene (original description)
Antennaria anaphaloides f. straminea (B.Boivin) B.Boivin accepted as Antennaria anaphaloides Rydb. (original description)
Antennaria parlinii var. farwellii (Greene) B.Boivin accepted as Antennaria parlinii subsp. fallax (Greene) R.J.Bayer & Stebbins (original description)
Arnica amplexicaulis var. prima (Maguire) B.Boivin accepted as Arnica lanceolata subsp. prima (Maguire) Strother & S.J.Wolf (original description)
Arnica chamissonis f. incana (A.Gray) B.Boivin accepted as Arnica chamissonis Less. (original description)
Aster novi-belgii f. albiflorus (Vict.) B.Boivin (original description)
Aster simplex var. estuarinus B.Boivin (original description)
Aster simplex var. estuarinus B.Boivin (original description)
Cacalia nardosmia var. glabrata (Piper) B.Boivin accepted as Cacaliopsis nardosmia (A.Gray) A.Gray (original description)
Erigeron hyperboreus f. albiflorus (Jordal) B.Boivin accepted as Erigeron hyperboreus Greene (original description)
Eupatorium purpureum f. anomalum (Vict.) B.Boivin accepted as Eupatorium quaternum DC. (original description)
Helianthus laetiflorus f. rigidus (Desf.) B.Boivin accepted as Helianthus pauciflorus subsp. pauciflorus Nutt. (original description)
Hieracium dorei Lepage (original description)
Matricaria maritima f. eligulata (Seem.) B.Boivin (original description)
Solidago beaudryi B.Boivin (original description)
Solidago bicolor var. tonsa (Fernald) B.Boivin accepted as Solidago hispida Muhl. ex Willd. (original description)
Solidago erskinei B.Boivin (original description)
Solidago krotkovii B.Boivin accepted as Oligoneuron krotkovii (B.Boivin) G.L.Nesom (original description)
Solidago uliginosa var. jejunifolia (E.S.Steele) B.Boivin accepted as Solidago speciosa var. speciosa Nutt. (original description)