Definition of Uredinales
: a large order of parasitic, basidiomycetous fungi that cause rusts in plants, have complex life cycles involving usually pycnial, aecial, uredinial, and telial stages often on different hosts, and are distinguished from the smuts by producing on a sterigma basidiospores which germinate not by budding but by growing out into an infective hypha
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Origin and Etymology of uredinales
New Latin, from Uredin-, Uredo + -ales
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