Coccocarpia erythroxyli

Spore Ascus

Thin Section

Thallus

Lichen Index
Coccocarpia erythroxyli asci.

When asci are pretreated with potassium hydroxide and then potassium iodide, they not only react by turning blue but the ascus tip takes on a specific stain pattern that can be used to identify genera. Parts of the ascus tip absorb the stain differently then others which accounts for the specific patterns.