Are both Nigella and Leucanthemella both plants?
Leucanthemella Leucanthemella is a genus of flowering plants in chamomile tribe within the sunflower family.
Campanula cochleariifolia Campanula cochleariifolia (also Campanula cochlearifolia), common name earleaf bellflower or fairy's-thimble, is a species of flowering plant in the genus "Campanula" of the family Campanulaceae, native to the Pyrenees, Alps, and Carpathian Mountains of Central Europe. It is a rhizomatous herbaceous perennial growing to 10 cm . Clumps of bright green leaves produce nodding pale blue bell flowers on wiry stalks.