''Guardiola odontophylla'' is a rare North American species of plants in the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It is found only in northern Mexico in the state of

Durango Durango (), officially named Estado Libre y Soberano de Durango ( en, Free and Sovereign State of Durango; Tepehuán: ''Korian''; Nahuatl: ''Tepēhuahcān''), is one of the 31 states which make up the 32 Federal Entities of Mexico, situated in ...

.Robinson, Benjamin Lincoln. 1899. Bulletin of the Torrey Botanical Club 26: 234
/ref> ''Guardiola odontophylla'' is a branching perennial with a purple stem, hairless and appearing whitish because of a waxy coating. Flower heads have both ray flowers and disc flowers.

References

odontophylla Flora of Durango Plants described in 1899 {{Millerieae-stub