Rusts are fungi in the Uredinales order that are plant parasites and resemble rust.“Ravenelia. a, stem of Cassia nictitans with teleutospores on the stem and uredospores on the leaves; b, stem and teleutospores enlarged; c, section showing the teleutospores.”
William Dwight Whitney The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1911)
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