Plectranthus
Not a generally well-known name among gardeners, Plectranthus is a genus of plants in the mint family, Lamiaceae. Closely related to Solenostemon (coleus), most species are grown for their foliage, attractively variegated in some cultivars, rather than their flowers. All require protection from frost, and several make good houseplants.
This genus was featured in an article in The Garden entitled A New Leaf