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The ascigerous fructification of lichens, forming masses of various shapes.

The lichens, according to the "Schwendener Hypotheses," consist of ascigerous fungi parasitic on alg�.

Later, when ascigerous fungi were separated from stylosporous fungi, this group was revised, the ascigerous species only being retained.

As at present limited, the Pyrenomycetes are "ascigerous fungi having the fructification enclosed within a perithecium."

There is a great external resemblance in them to the ascigerous cups, but there is no evidence that they are ever transformed into such.