Excerpt from The Fungi Which Cause Plant Disease
This volume is intended to introduce to the student the more important cryptogamic parasites affecting economic plants in the United States, with sufficient keys and descriptions to enable their identification. Technical description of each division, order, family, genus and species when important is given unless the essential characters are to be clearly inferred from preceding keys or text. Gross descriptions of the host as diseased, i.e., of the disease itself, have been avoided since such are to be found in "Diseases of Economic Plants." Effort has been made to avoid duplication of matter contained in that volume. Abundant citations to the more important papers are given, sufficient, it is believed, to put the student in touch with the literature of the subject.
While many parasites not yet known in the United States are briefly mentioned, especially the more important ones or those which are likely to invade America, no attempt has been made to list all of these. Non-parasitic groups closely related to those that are parasitic have been introduced in the keys merely to give a larger perspective to the student.
Effort has been made to give at least one illustration of each genus that is of importance in the United States.
The author is indebted for descriptions, keys, etc., to the various standard works. Those which have been drawn upon most largely are Saccardo's Sylloge Fungorum, Die Naturlichen Pflanzenfamilien of Engler & Prantl, Clinton's Ustilaginales of North America, Clement's Genera of Fungi, and Minnesota Mushrooms, Plowright's British Uredinese and Ustilagine?, Arthur and Murrill each in North American Flora.
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