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It just so happens that in many cup fungi, a sudden change in humidity triggers a massive multiple discharge — a “puff”, like you saw above.

In a work of this kind especial attention is naturally given to the order of Discomycetes or cup fungi.

Under the name of lichens are comprised a large number of fungi, differing a good deal in structure, but most of them not unlike the cup fungi.

Where the sacs soon become free, no special covering, mostly fleshy, cup-like fungi, Peziza, cup fungus.

This cup fungus produces a crop of spores capable of causing infection.