Byssoid lichen

A Byssoid lichen is a lichen with a wispy growth form, having the appearance of teased wool. "Coenogonium implexum" is a byssoid lichen.
Byssoid lichens are of two types, those where the cottony structure is dominated by photobiont filaments (e.g., "Trentepohlia"), and those where fungal hyphae make up the cottony form, with the hyphae having typically coccoid photobionts among them.