Named for the very unErigeron-like (that little rumble you just felt was my English teacher rolling over in her grave) hummocks of foliage that are texturally amusing in a skewed botanical sense.  The ray flowers add to the charm and makes this a suitable plant for the rock garden.

Rock Fleabane.  A mighty mite in the Asteraceae family, this rock crevice dweller was not discovered until 1978 in the Chiricahua Mts in Arizona and later was found 200 miles east in the Black Range of New Mexico.  It has been very easy and rock hardy for us and although drought tolerant, adapts to frequent irrigation.  Small white flowers.