FIG. 34.21 Basidiomycetes. (a) Corn smut (Ustilago maydis); (b) pseudoflowers that form when plants are infected by the rust Puccinia monoica; (c) a toadstool fungus—the highly toxic Amanita.

Sources: a. Inga Spence/Science Source; b. Bitty Roy, University of Oregon; c. David Clapp/Getty Images.