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Images of British Lichens



Usnea flammea Stirt.


Fruticose, tufted to ± pendulous, much branched, variable, green to grey-green, yellow-green in well-lit situations, not blackened at the base, base and branches often conspicuously cracked-annulate, finer branches often rather dense and wiry, tuberculate and isidiate, eroding to become sorediate. Western Britain, locally frequent on trees and rocks.

Refs: Nordic Lichen Flora (2011) 4: 117, 168 (photos, printed too dark); James (2003), 20 (line illustrations); Smith et al. (2009), 924; Purvis et al. (1992), 625; Dobson (2005), 444 (photo); Dobson (2011), 450-1 (photo); Allen (2007), 30 (photo); Hinds & Hinds (2007), 496.

FGBI: http://fungi.myspecies.info/all-fungi/usnea-flammea

 
Usnea flammea
On branch of Oak (Quercus robur), Orielton, Pembrokeshire, May 2009.
Identity confirmed by Pat Wolseley (TLC demonstration, chemotype with stictic, constictic and norstictic acids).
 
Usnea flammea
On trunk of Common Sallow (Salix cinerea subsp. oleifolia) in damp woodland, Orielton, Pembrokeshire, May 2009.
Identity confirmed by Pat Wolseley (TLC demonstration, chemotype with stictic and constictic acids).
 
Usnea flammea in situ
Usnea flammea, branches
Usnea flammea, stem base
On Common Sallow (Salix cinerea subsp. oleifolia) in damp woodland, Orielton, Pembrokeshire, May 2009:
thallus in situ; branches showing papillae and isidia; non-blackened stem-base.
Identity confirmed by Pat Wolseley (TLC demonstration, chemotype with stictic, constictic and norstictic acids).


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Uploaded May 2009, last updated January 2016