leadwort

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various chiefly tropical ornamental plants of the genus Plumbago, having five-lobed often blue flowers.
• noun Any of various plants of the genus Ceratostigma, especially C. plumbaginoides, having shiny leaves and blue flowers and often grown as a ground cover.

from The Century Dictionary.

• noun An herbaceous plant of southern Europe, Plumbago Europæa.
• noun By extension, any plant of the genus Plumbago, of the order Plumbagineæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A genus of maritime herbs (Plumbago). Plumbago Europæa has lead-colored spots on the leaves, and nearly lead-colored flowers.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a plant of the genus Plumbago with blue flowers