Are both Nigella and Leucanthemella both plants?
Leucanthemella Leucanthemella is a genus of flowering plants in chamomile tribe within the sunflower family.
Vella (plant) Vella is a genus of plants in the family Brassicaceae, under which there are no fewer than six species. Species are many branched, and have hairy, sessile, entire leaves that are narrower in width at their bases, widening out to form ovals. Fruits are stiff follicles. "Vella" is endemic to that area of land encompassing Algeria, Morocco, and Spain.