Pelargonium 'Mrs. Cox'.
Genus Pelargonium, species not known (by me). The common name for the genus is scented geraniums, or storksbills.
Wikipedia says "Species of Pelargonium are evergreen perennials indigenous to Southern Africa and are drought and heat tolerant, and can tolerate only minor frosts. Pelargoniums are extremely popular garden plants, grown as annuals in temperate climates."