An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian - Britton, Nathaniel Lord, 1859 -1934 (C. Scribner's sons, 1913)

An illustrated flora of the northern United States, Canada and the British possessions from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic ocean westward to the 102d meridian - Britton, Nathaniel Lord, 1859 -1934 (C. Scribner's Sons, 1896)

An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian - Britton, Nathaniel Lord, 1859 -1934 (C. Scribner's sons, 1913)

An illustrated flora of the northern United States, Canada and the British possesions from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102d meridian. Vol. 3, Apocynaceae to Compositae, dogbane to thistle - Britton, Nathaniel Lord, 1859 -1934 (C. Scribner, 1898)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1951)

An illustrated guide to the flowering plants of the middle Atlantic and New England states (excepting the grasses and sedges) the descriptive text written in familiar language - Stevens, George T. (George Thomas), 1832 -1921 (Dodd, Mead and company, 1910)

An illustrated guide to the special status plants of the Shoshone Resource Area (Upper Snake River District) - United States. Bureau of Land Management. (Bureau of Land Management, Idaho State Office, 1998)

Illustrated manual of proposed endangered and threatened plants of Utah - U.S. Fish; Wildlife Service (Denver, Colorado, 1979)

Illustrations of the principal natural orders of the vegetable kingdom - Oliver, Daniel, 1830 -1916 (Chapman and Hall, 193 Piccadilly, 1874)

Immigrant plants in the Hawaiian islands. II - Fosberg, F. Raymond (Francis Raymond), 1908 -1993 (The University, 1948)

Index : appendix to flora of the Columbia County area, New York - McVaugh, Rogers, 1909 -2009 (University of the State of New York, 1958)

Index herbariorum. Part II, Collectors - International Bureau For Plant Taxonomy; Nomenclature (Bohn, Scheltema & Holkema, 1954)

Index herbariorum. Part II, Collectors - International Bureau For Plant Taxonomy; Nomenclature (Bohn, Scheltema & Holkema, 1983)

Index herbariorum - International Association for Plant Taxonomy (Published and Distributed for International Association for Plant Taxonomy by New York Botanical Gardens, 1990)