Plectranthus

Plectranthus is a genus of flowering plants in the mint family, Lamiaceae. The genus includes herbaceous perennials, shrubs, and woody subshrubs, many cultivated for foliage color or as culinary herbs. Plectranthus is widely distributed in tropical and subtropical regions, with centers of diversity in Africa and Madagascar, but cultivated worldwide as ornamentals and houseplants.

Description: Plants typically have square stems and opposite leaves with aromatic oils. Leaves are often fleshy or broadly ovate with serrated margins; inflorescences are spikes of bilabiate flowers typical of mint family. Growth forms range from trailing groundcovers to upright shrubs. Some species tolerate shade, others prefer bright light and warmth.

Habitat and distribution: native to Africa, Madagascar, Asia, and Australia; many species naturalized in gardens and landscapes; some can become weedy in suitable climates.

Cultivation and uses: In horticulture, coleus cultivars are grown for colorful foliage; Plectranthus scutellarioides is common under the old name Coleus. Plectranthus amboinicus, commonly called Cuban oregano, is used as an herb with oregano-like flavor. Swedish ivy (P. verticillatus) is popular as a trailing houseplant. Propagation by cuttings; prefer well-drained soil; protect from frost; drought tolerant; some species can be invasive if escaped.

Taxonomy and name: The genus name derives from Greek, and some species formerly placed in Coleus are now treated under Plectranthus. The family is Lamiaceae, the mint family.