Hale, Mason E., Jr. Formerly, Smithsonian Institution, Washington, DC.
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An order of the Ascolichenes shared by the Ascomycetes. This order formerly included all lichens with linear elongate ascocarps called hysterothecia. However, species with true paraphyses are now classified in the family Graphidaceae of the Lecanorales, leaving in the lichenized Hysteriales only those species with a so-called ascolocular structure. See also: Lecanorales
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