Urediniospores (or uredospores) are thin-walled produced by the uredium, a stage in the life-cycle of rusts.
Development
Urediniospores develop in the
uredium, generally on a leaf's under surface.
Morphology
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Urediniospores usually have two Dikaryon nuclei within one cell. In mass they are usually pale brown in contrast to which are generally dark brown.
See also
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C.J. Alexopolous, Charles W. Mims, M. Blackwell, Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004)
