[BOTANICAL]. Curtis, William (1746-1799). Iris Pseudacorusfrom Flora Londinensis, ca 1878Engraving with hand-coloring, plate 17 1/16 x 9 15/16 in, sheet 18 3/4 x 11 1/2 in, on unwatermarked laid paper, a few minor marginal chips discreetly repaired, manuscript plate number to upper margin, matted.