Centaurium calycosum
 Centaurium calycosum is a species of flowering plant in the gentian family known by the common name Arizona centaury. It is native to northern Mexico and the southwestern United States where it grows in moist places in otherwise dry habitat such as riverbanks. This is an erect biennial herb growing up to half a meter tall. The widely lance-shaped leaves appear in a basal rosette and along the slender stem each up to 7 centimeters long.