Cyphella
cyphella (noun, pl. cyphellae) – a pore recessed into the lower thallus surface, surrounded by a pale ring and lined throughout with a pseudocortex of loosely interwoven, non-gelatinized hyphae, originating from the medulla; the pseudocortex frequently consisting of globular cells and thus becoming indistinctly paraplectenchymatous and not of the same structure as the lower cortex; cyphellae are always distinctly concave and und thus appearing cup-like, they are rounded to ovate, rarely effigurate (i. e., with a fuzzy edge), but never elongated nor linear; true cyphellae are known only from two genera: Sticta and Oropogon. This is:part of lower thallus surface.
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