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: Lamiales
Family/Famiglia: Boraginaceae (Borage family)
Genus/Genere: Tiquilia Pers.

Species/Specie:
1) Tiquilia canescens (A. DC.) A. Richardson Woody crinklemat
2) Tiquilia nuttallii (Hook.) A. Richardson Nuttall's coldenia
3) Tiquilia palmeri (A. Gray) A. Richardson Palmer's coldenia
4) Tiquilia plicata (Torrey in Emory) A. Richardson Fanleaf crinklemat