This little groundcover is all over the valley. Matthiola parviflora, a Mediterranean species (native to Madeira, the Canary Islands, the Iberian Peninsula, North Africa, Israel and Jordan), has recently become established in and around Tucson, central Arizona.
U.S. Weed Information: In North America Matthiola parviflora is listed as an Invasive Plant of Saguaro National Park - 02/21/2017) (Present and Eradicated). Plants included here may become weedy or invasive.