Jackia may refer to any of three genera of plants, all named after William Jack (1795–1822):

• Jackia Wall., published in 1824, a synonym of Jackiopsis in family Rubiaceae
• Jackia Spreng., nom. illeg., named in 1826, a synonym of Eriolaena in family Malvaceae
• an orthographic variant used by the author of Jakkia Blume, published in 1823, in family Polygalaceae

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