Fungi Outer Hebrides


Family: Parmeliaceae

Parmotrema crinitum (Ach.) M. Choisy

Type: Foliose

Grey foliose thallus with rounded, overlapping lobes with irregular, incised edges. Isidia fragile, marginal and laminal, cylindrical or lobulate, often becoming coralloid-branched, brown-tipped and frequently with accompanying black cilia. Lower surface black with a broad, brown erhizinate marginal zone. Rhizines dense, simple. Apothecia rare, comprising brown discs with isidiate margins. On siliceous rock outcrops, in cliff-top heaths near coasts, and mossy tree trunks.

Determiner: 
Christine Johnson

References: 
Smith et al. editors (2009) The Lichens of Great Britain and Ireland
Dobson (2018) Lichens: an Illustrated Guide to the British and Irish Species
Thell & Moberg, editors (2011) Nordic Lichen Flora, Volume 4: Parmeliaceae

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