Manual of British Discomycetes, with descriptions of all the Species of Fungi hitherto found in Britain included in the Family, and Illustrations of the Genera.

In the Discomycetes or "disk fungi," the spores are produced in minute membraneous sacs, each sac usually containing eight spores.

But in the Discomycetes the hymenium soon becomes more or less exposed, and in the latter it is enclosed in a perithecium.