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Urediniospores (or uredospores) are thin-walled spores produced by the uredium, a stage in the life-cycle of rusts.


Urediniospores develop in the uredium, generally on a leaf's under surface.


  • Urediniospores usually have two dikaryote nuclei within one cell. In mass they are usually pale brown in contrast to teliospores which are generally dark brown.

See also[edit]


  • C.J. Alexopolous, Charles W. Mims, M. Blackwell, Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5