What's the difference between leadwort and plumbago?

Leadwort

Definition:

(n.) A genus of maritime herbs (Plumbago). P. Europaea has lead-colored spots on the leaves, and nearly lead-colored flowers.

Example Sentences:

Definition:

(n.) Same as Graphite.
(n.) A genus of herbaceous plants with pretty salver-shaped corollas, usually blue or violet; leadwort.

Example Sentences:

(1) Plumbagin, a compound derived from the roots of Plumbago zeylanica (Chitramool) was studied for its effect on the development of antibiotic resistance using antibiotic sensitive strains of Escherichia coli and Staphylococcus aureus.
(2) Plumbagin isolated from Plumbago scandens in local use, was responsible for a complete healing of the injuries treated.
(3) Plumbagin (2-methyl-5-hydroxy, 1:4 naphthoquinone) isolated from the roots of Plumbago zeylanica when administered to hyperlipidaemic rabbits, reduced serum cholesterol and LDL-Chol.
(4) Those of Hibiscus, Vitex and Plumbago species, as well as Tripterygium wilfordii glycosides, which are being evaluated in combination with gossypol, are mentioned here.