Kingdom/Regno: Plantae (Plants/Piante)
Subkingdom/Sottoregno: Tracheobionta (Vascular plants/Piante vascolari)
Superdivision/Superdivisione: Spermatophyta (Seed plants/Piante con semi)
Division/Divisione: Magnoliophyta (Flowering plants/Piante con fiori)
Class/Classe: Magnoliopsida (Dicotyledons/Dicotiledoni)
Subclass/Sottoclasse: Asteridae
Order/Ordine: Asterales
Family/Famiglia: Asteraceae (Aster family)
Genus/Genere: Oclemena Greene (aster)

Species/Specie:
1) Oclemena acuminata (Michx.) Greene [Leafl. Bot. Observ. Crit. 1:4. 1903] (= Aster acuminatus Michx.) Mountain aster
2) Oclemena blakei (Porter) G. L. Nesom [Phytologia 77:264. 1995 ("1994")]
3) Oclemena nemoralis (Aiton) Greene [Leafl. Bot. Observ. Crit. 1:5. 1903] (= Aster nemoralis Aiton) Bog aster
4) Oclemena reticulata (Pursh) G. L. Nesom [Phytologia 77:264. 1995 ("1994")] (= Aster reticulatus Pursh) Pinebarren aster