Are Mertensia and Centranthus types of flowering plants?
Mertensia Mertensia is a genus of flowering plants in the family Boraginaceae. They are perennial herbaceous plants with blue or sometimes white flowers that open from pink-tinged buds. Such a change in flower color is common in Boraginaceae and is caused by an increase of pH in the flower tissue. "Mertensia" is one of several plants that are commonly called "bluebell". In spite of their common name, the flowers are usually salverform (trumpet-shaped) rather than campanulate (bell-shaped).
Malcolmia maritima Malcolmia maritima, Virginia stock is a popular annual garden plant from the family Brassicaceae. A beautiful and profusely flowering annual, it is probably one of the easiest of all plants to grow. Growing to about 6 - tall, it makes a mass of pink, purple and white fragrant four petalled (cruciform) flowers. It is native in Greece and Albania and may be naturalized elsewhere in Mediterranean Europe where it occurs in maritime sandy habitats and in waste places.