| Kingdom | Plantae | Plants, but not fungi, lichens, or algae |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Asteridae | A large class that encompasses asters |
| Order | Asterales | Flowering plants with a central disk flower and surrounding petals, like daisies |
| Family | Asteraceae | The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers |
| Genus | Bidens | From Latin bis, “twice,” and dens, “tooth,” for the pair of bristles on the achenes |
| Species | aristosa | |
Bidens aristosa (Michx.) Britton var. fritcheyi Fernald
Bidens aristosa (Michx.) Britton var. mutica (A. Gray) Gattinger
Bidens aristosa (Michx.) Britton var. retrorsa (Sherff) Wunderlin
Bidens involucrata (Nutt.) Britton
Bidens polylepis S.F. Blake
Bidens polylepis S.F. Blake var. retrorsa Sherff
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