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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. |
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On branch of Oak (Quercus robur), Orielton, Pembrokeshire, May 2009. Identity confirmed by Pat Wolseley (TLC demonstration, chemotype with stictic, constictic and norstictic acids). |
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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). |
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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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© A.J. Silverside
Uploaded May 2009, last updated November 2011
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