Illustrations and Images

  • Flowering plant index of illustration and information (compiled by Richard T. Isaacson), Boston: G. K. Hall, 1979, 1982 (QK11 .I8 Reference).
  • Index Londinensis, Oxford: Clarendon Press, 1929-31 and later supplements (QK11 .P95 Reference). Illustrations of flowering plants, ferns, and fernallies, by genus, species, publication place.