1. red-flowered Yarrow (Achillea millefolium cv., possibly 'Paprika' or 'Red Velvet')
2. cerise-flowered Twinspur (Diascia personata, or a hybrid involving this species)
3. yellow-flowered Garden Mecardonia (Mecardonia x hybrida cv.). Garden Mecardonia are bred from varietas of Mecardonia procumbens (M. procumbens var. flagellaris, M. procumbens var. tenella, etc.), though other species might also be involved.
4. violet-flowered Aubrieta Rock-cress (Aubrieta x hybrida cv.) Cultivated Aubrieta are hybrids of uncertain parentage, likely involving Aubrieta deltoidea.