Epilithic, growing on the rock surface, [70].
Epiphloeodal, thallus growing on the surface of the bark, [77].
Epiphyllous, growing on leaves, [363].
Epithecium, upper layer of thecium (hymenium), [158].
Erratic lichens, unattached and drifting, [259].
Exobasidial, Steiner’s term for sporophore without a secondary sporiferous branch, [200].
Exogenous, produced externally, as spores on tips of hyphae; [see also under thallus].
Fastigiate cortex, formed of clustered parallel hyphal branches vertical to long axis of thallus, [82].
Fat-cells, specialized hyphal cells containing fat or oil, [75], [215] et passim.
Fibrous cortex, formed of hyphae parallel with long axis of thallus, [82].