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Definition of Horsehair lichen
1. Noun. Any of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair.
Exact synonyms: Horsetail Lichen
Generic synonyms: Lichen
Group relationships: Alectoria, Genus Alectoria
Generic synonyms: Lichen
Group relationships: Alectoria, Genus Alectoria