Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1939)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1943)

Illinois Natural History Survey bulletin - Illinois. Natural History Survey Division (The Survey, 1987)

An illustrated dictionary of scientific terms - Rossiter, William, 1897 (G. P. Putnam's Sons, 1878)

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, 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, 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 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, 1897)

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, 1923)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1960)

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)

Illustrated key to the wild and commonly cultivated trees of the northeastern United States and adjacent Canada; based primarily upon leaf characters - Collins, J. Franklin (James Franklin), 1863 -1940 (Holt, 1912)

Illustrated key to the wild and commonly cultivated trees of the northeastern United States and adjacent Canada; based primarily upon leaf characters - Preston, Howard W. 1859 - (H. Holt and company, 1912)

Important western browse plants - Dayton, William A. (William Adams), 1885 - (U.S. Dept. of Agriculture, 1931)

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

Index Kewensis. names of seed-bearing plants at the rank of family and below published between January 1986 and the end of 1990 with some omissions from earlier years. Supplement nineteen - Royal Botanic Gardens, Kew. (1901)

Index Kewensis. names of seed-bearing plants at the rank of family and below published between January 1991 and the end of 1995 with some omissions from earlier years. Supplement twenty - Royal Botanic Gardens, Kew. (Royal Botanic Gardens, Kew, 1901)