uredo stage

noun

, Mycology.

1. the summer stage in certain rust fungi when uredinia are produced.

Example Sentences

Cineraria and Senecio Disease.—Senecio pulcher, soon after its introduction into England, was attacked, and in some gardens completely destroyed, by a fungus named Puccinia glomerata, or rather the Uredo stage of this fungus with simple, not compound, spores.

From Project Gutenberg