Arabis tricornuta Rollins Pennellia tricornuta (formerly Arabis tricornuta)[2][3] is a species of flowering plant in the mustard family known by the common names Rincon Mountain rockcress and Chiricahua rockcress.

It is endemic to Arizona in the United States, where it occurs in Cochise, Pima, and Santa Cruz Counties.

[3][1] This perennial herb grows 15 to 90 centimeters tall.

It produces flowers with lavender petals and green or purple sepals.

[3] This plant grows in rocky habitat, on slopes and roadsides, and under pines.