Fungi Outer Hebrides


Family: Physciaceae

Physcia caesia (Hoffm.) Fürnr.

Type: Foliose

A small, foliose species, with narrow, convex lobes with distinct white flecks (pseudocyphellae). Conspicuous, large soralia, usually rounded and convex, first appearing as grey-blue areas on the thallus surface. Marginal cilia absent. Extremely common and widespread on rocks, concrete and even asphalt

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
Ahti et al. editors (2002) Nordic Lichen Flora, Volume 2: Phyciaceae

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