Our edible toadstools and mushrooms and how to distinguish them; a selection of thirty native food varieties, easily recognizable by their marked individualities, with simple rules for the identification of poisonous species - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper, 1895)

Our living resources : a report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems - United States. National Biological Service. (U.S. Dept. of the Interior, National Biological Service, 1995)

The out-door world, or, Young collector's handbook - Furneaux, William S. (Longmans, Green, 1893)

Outlines of British fungology; containing characters of above a thousand species of Fungi, and a complete list of all that have been described as natives of the British Isles - Berkeley, M. J. (Miles Joseph), 1803 -1889 (L. Reeve, 1860)

Outlines of British fungology. Supplement - Smith, Worthington George, 1835 -1917 (L. Reeve, 1891)

Outlines of classification and special morphology of plants - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1887)