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: Liliopsida (Monocotyledons/Monocotiledoni)
Subclass/Sottoclasse: Liliidae
Order/Ordine: Liliales
Family/Famiglia: Liliaceae (Lily family)
Genus/Genere: Tofieldia Huds.

Species/Specie:
1) Tofieldia calyculata (L.) Wahlenb. [Fl. lapp. 90. 1812] (H scap) Tajola comune
2) Tofieldia coccinea Richardson [J. Franklin, Narr. journey Polar Sea 736. 1823 (Bot. App. 8)]
3) Tofieldia glutinosa (Michaux) Pers. Glutin tofieldia
4) Tofieldia minima (Hill) Druce [Rep. Bot. Exch. Club Soc. Brit. Isles 3:439. 1914]
5) Tofieldia nuda Maxim. [Bull. Acad. Imp. Sci. Saint-Pétersbourg 17:176. 1872 (Diagn. pl. nov. jap.)]
6) Tofieldia occidentalis S. Watson [Proc. Amer. Acad. 14:283. 1879] Western tofieldia
7) Tofieldia pusilla (Michx.) Pers. [Syn. pl. 1:399. 1805] (H scap) Tajola minore Scotch-asphodel