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"The Blue Passion Flower"--an illustration (hand-colored aquatint) from Thornton's "Temple of Flora, or Garden of Nature," the most famous of all English botanicals and arguably the greatest illustrated book on flowers ever published. A physician, poet, philosopher, painter, and passionate amateur botanist, Thornton (1765-1832) gave up his medical practice when he came into the family fortune in 1797 to devote himself to "The Temple of Flora," a lavish homage to the great Swedish botanist Carl Linnaeus (1707-1778). An artistic triumph, "The Temple of Flora" nevertheless brought Thornton to financial ruin, and he managed to complete only about one-third of his projected total of 90 folio plates. The illustration of this plate is by Peter Reinagle; it was engraved by James Caldwall.