Icones plantarum (illustrations of plants - figures, with brief descriptive characters and remarks, of new or rare plants, selected from the Kew herbarium) was started by Sir William Jackson Hooker in 1837 and edited the first 10 volumes and continued by his son Joseph Dalton Hooker (9 volumes) and then others. Over 25 volumes are available on Internet Archive or Botanicus (same scan…simple different user interface so take your pick).
The Hookers (father and then son) were directors of the Royal Botanic Gardens, Kew from 1841-1865 - the time period that the gardens became world renowned. They published throughout their long lives (the father lived to be 80 and the son 94) on botanical subjects. One of Joseph Dalton Hooker’s daughters (Harriet Anne Hooker) was a botanical illustrator and married William Turner Thiselton-Dyer who was director of the gardens from 1885-1905.