Many plant pathogens are members of the Phylum Ascomycota. Saccharomyces , yeast, is a somewhat unusual member of the Phylum Ascomycota in that it is unicellular. Note the red-staining ascospores. Lichens consist of a fungus and an alga that form a distinct entity. The organisms of the lichen have a mutualistic relationship.
Lichens are common in the Sacramento region.
Try to locate the cortex, medulla and algal layer. Also note the ascoma with its hymenium layer. The ascospores that are formed function in sexual reproduction of the lichen. Reindeer moss is a lichen eaten by reindeer, as the name implies.