Fungi Outer Hebrides


Family: Parmeliaceae

Usnea subfloridana Stirt.

Type: Fruticose

The most commonly recorded Usnea species in the islands. Commonly found on trees and fence posts. The thallus is very variable in the degree of branching. The combination of a dense medulla, lack of articulation, blackened base, nature of the soralia and chemistry are diagnosic

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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