All the fungi which belong in the class Ascomycetes develop their spores in little membranous sacs called asci. These asci are, as a rule, collected, together with slender empty asci, called para-physes, in variously shaped bodies, known in different orders by different names, such as perithecium, ascoma, apothecium, and receptacle. This class includes in its numbers individuals ranging in size from microscopic one-celled plants to conspicuous and often beautiful specimens. We shall concern ourselves with but a few of those conspicuous ones which are attractive either from an edible or an artistic standpoint.

Spore Sac Fungi Ascomycetes 319