Apargia nudicaulis (L.) Britton accepted as Leontodon crispus Vill. (original description)
Cirsium odoratum Britton (original description)
Echinacea pallida Britton (original description)
Echinacea paradoxa (Norton) Britton (original description)
Leontodon erythrospermus (Andrz. ex Besser) Britton accepted as Taraxacum erythrospermum Andrz. ex Besser (original description)
Leontodon latilobus Britton (original description)
Phaethusa helianthoides (Michx.) Britton (original description)
Phaethusa occidentalis (L.) Britton accepted as Verbesina occidentalis (L.) Walter (original description)
Phaethusa virginica (L.) Britton (original description)
Ridan alternifolius Britton (original description)