Hafter
From LIAS Glossary
hafter (noun, pl. hafters) – a flat direct attachment point formed through direct contact of the thallus to its substrate; typically observed in fruticose and foliose lichens that lack distinct attachment organs like rhizines, hapters, an umbilicus, e. g., the foliose lichen genus Hypogymnia got its name because it is "nude below", lacking distinct attachment organs, instead being attached only by hafters. This is:part of lower thallus surface.
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