John Gerard, also spelt John Gerarde, (c. 1545–1612) was a botanist and herbalist. He maintained a large herbal garden in London. His chief notability is as the author of a big – 1484 pages – and heavily illustrated Herball, or Generall Historie of Plantes. First published in 1597, it was the most widely circulated botany book in English in the 17th century.Except for the additions of a number of plants from his own garden and from North America, Gerard's Herbal is largely an English translation of Rembert Dodoens's Herbal of 1554, itself also highly popular (in Dutch, Latin, French and other English translations).Gerard's Herball is profusely illustrated with high-quality drawings of plants, with the printer's woodcuts for the drawings largely coming from Dodoens's book and from other Continental European sources, but also containing an original title page with copperplate engraving by William Rogers.Two decades after Gerard's death, his Herbal was corrected and expanded to about 1700 pages. The botanical genus Gerardia is named in Gerard's honour.