Alexander Marshal (c.1620 – 7 December 1682 in London) was an English entomologist, gardener and botanical artist, noted for the florilegium he compiled, consisting of some 160 folios of plants cultivated in English gardens, and finally presented to George IV in the 1820s. Samuel Hartlib, the German polymath, wrote that Marshal had by 1650 produced a florilegium for the botanist and gardener John Tradescant the Younger. Marshal was described as an accomplished painter of flowers and fruit in Sir William Sanderson's Graphice of 1658.