We've grown a couple of these stonecresses, A. grandiflorum and A. pulchellum. They are part of the Brassicaceae family, so have 4-petalled flowers, pink or white, in rounded heads. Remarkably there are around 60 species, almost all from Turkey. They are good for drought-type garden, in full sun and normally grow on limestone rocks. They should be very suitable for a rock, or crevice garden and but are also happily growing in our scree garden.