- Eurybia avita, Alexanders Rock Aster;Aster avitus Alexander
- Eurybia hemispherica, Southern prairie aster;Southern Prairie Aster;Aster gattingeri Alexander, non Kuntze;Aster hemisphericus Alexander;Aster pedionomus Alexander;Aster verutifolius Alexander;Heleastrum hemisphericum (Alexander) Shinners
- Ludwigia repens, Creeping Primrose-willow;Isnardia intermedia Small & Alexander;Isnardia repens (JR Forst) Dc;Ludwigia natans Elliot
- Matelea baldwyniana, Baldwins Milkvine;Gonolobus baldwynianus Sweet;Odontostephana baldwyniana (Sweet) Alexander;Vincetoxicum baldwynianum (Sweet) Britton
- Matelea flavidula, Yellow Carolina Milkvine;Odontostephana flavidula (Chapm) Alexander
- Senecio vernalis, Eastern Groundsel;Senecio leucanthemifolius var vernalis (Waldst & Kit) C Alexander
- Smyrnium perfoliatum, Perfoliate Alexanders
- Symphyotrichum walteri, Walters Aster;Aster squarrosus sensu Walter, non All;Aster walteri Alexander;Lasallea walteri (Alexander) Semple & L Brouillet;Virgulus walteri (Alexander) Reveal & Keener
- Verbesina aristata, Coastal Plain Crownbeard;Actinomeris nudicaulis Nutt;Helianthus aristatus Elliot;Pterophyton aristatum (Elliot) Alexander;Verbesina nudicaulis (Nutt) A Gray
- Zizia trifoliata, Meadow alexanders
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