Arabis fecunda)[2] is a species of flowering plant in the mustard family known by the common names Mt.

[3][4] This plant grows in Ravalli, Beaverhead, and Silver Bow Counties in Montana.

[1] The soils are calcareous, made up of a calcium silicate parent rock.

[6] Threats to the species include the noxious weed Centaurea maculosa, spotted knapweed.

[1][5] The weed has a negative effect on rockcress populations, reducing seedling establishment.