Definition of Ustilaginales
: an order of parasitic basidiomycetous fungi that cause smuts of various plants and especially of cereal grasses and have a complex life cycle which may include conidia production and in which sessile haploid basidiospores ultimately yield thick-walled dark-colored chlamydospores which typically replace the ovaries of an infected plant in a smutty mass and germinate with a meiosis to form a promycelium and begin a new basidial generation — compare uredinales ustilago — see tilletiaceae
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Origin and Etymology of ustilaginales
New Latin, from Ustilagin-, Ustilago + -ales
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