Discolichenes
Series I. Coniocarpineae. The paraphyses branch and form a network (capillitium) over the asci, the capillitium and ejected spores forming a long persistent powdery mass (mazaedium).
Caliciaceae, Cypheliaceae, Sphaerophoraceae.
Series II. Graphidineae. Apothecia seldom round, usually elongated-ellipsoidal, no capillitium.
Arthoniaceae, Graphidiaceae, Roccellaceae.
Series III. Cyclocarpineae, Apothecium usually circular, no capillitium.
A. Spores usually two-celled, either with a strongly thickened cross-wall often perforated by a narrow canal or with cross-wall only slightly thickened. In the first case the spores are usually colourless, the second case always brown. Buelliaceae, Physciaceae.
B. Spores unicellular, parallel-multicellular or muriform, usually colourless, cross-walls usually thin.
α Thallus in moist state more or less gelatinous. Gonidia always belonging to the Cyanophyceae, Lichinaceae, Ephebaceae, Collemaceae, Pyrenopsidaceae.