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Morus, a genus of flowering plants in the family Moraceae, consists of 19 species of deciduous trees commonly known as mulberries, growing wild and under cultivation in many temperate world regions.[1][2][3][4] Generally, the genus has 64 subordinate taxa,[5] three of which are well-known and are ostensibly named for the fruit color of the best-known cultivar: white, red, and black mulberry (Morus alba, M. rubra, and M. nigra, respectively), with numerous cultivars and some taxa currently unchecked and awaiting taxonomic scrutiny.[6][5] M. alba is native to South Asia, but is widely distributed across Europe, Southern Africa, South America, and North America.[2] M. alba is also the species most preferred by the silkworm, and is regarded as an invasive species in Brazil and the United States.[2]