This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
A small genus of branching herbs and undershrubs with alternate fringed leaves and terminal and axillary dense heads of flowers. Calyx tubular, 5-parted. Corolla funnel-shaped. Stamens 5, hypogynous; styles united. The species are from Abyssinia and China. Name commemorative.
1. V. plumbaginoides, syn. Plumbago Laipentae. - A showy perennial from 1 to 2 feet high with obovate mucronate ciliate scaly leaves and bright blue ultimately violet flowers, appearing in Autumn. A native of Northern China.
Plumbago Capensis is a half-hardy procumbent or climbing shrub with scaly leaves and spicate panicles of handsome azure blue flowers, sometimes employed for bedding, etc.