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).
Carlemanniaceae The Carlemanniaceae are a tropical East Asian and Southeast Asian family of subshrub to herbaceous perennial flowering plants with 2 genera. Older systems of plant taxonomy place the two genera, "Carlemannia", and "Silvianthus" within the Caprifoliaceae or the Rubiaceae. The Angiosperm Phylogeny Group classification of 2003 places the group in the Lamiales, as a plant family more closely related to the Oleaceae than to the Caprifoliaceae.