A plant of the genus Plumbago with blue flowers WordNet 3.0 & Open English WordNet

Plumbago europaea, also known as the common leadwort, is a plant species in the genus Plumbago found in the Mediterranean Basin and Central Asia. Wikipedia

Leadwort is a common name for various flowering plants in the family Plumbaginaceae, in particular those in the genera: Ceratostigma PlumbagoIt can also refer to metallophyte plants capable of tolerating high levels of lead, such as spring sandwort Minuartia verna or alpine pennycress Thlaspi caerulescens. Wikipedia

Any of various maritime herbs of the genus Plumbago, some of which have lead-coloured spots on the leaves or nearly lead-coloured flowers. Wiktionary

Any of various herbs of the genus Plumbago. Wiktionary (translation)