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Images of British Lichens

Usnea filipendula Stirt.
(= U. dasopoga (Ach.) Nyl. (often as "dasypoga"): current correct name)

Fruticose, pendulous, pale grey to grey-green, black at base of main stem, main branches rather few, arising close to the base and then hanging vertically, usually with abundant, short, fine side-branches ('fibrils') that project horizontally in a 'fish-bone' pattern, papillate and isidiate especially towards the bases of the main branches; apothecia very rare, or unknown in Britain? Mainly in the north and west, especially on birch (Betula) and conifers in upland woods.

Refs: Nordic Lichen Flora (2011) 4: 116, 168 (photos, printed too dark, as U. dasypoga); James (2003), 19 (line illustrations); Smith et al. (2009), 923; Purvis et al. (1992), 625; Dobson (2005), 443 (photo); Dobson (2011), 449-50 (photo, as U. dasypoga); Jahns (1983), 186-7 (photo); Tõrra & Randlane (2007), 420 (photo), 426; Wirth (1995), 2: 944 (photo); Wirth et al. (2004), 35 (photo); Wirth, Hauck & Schulz (2013), 2: 1134, 1136 (photo, as U. dasypoga); Frahm et al. (2010), 162 (photo); Moberg & Holmåson (1984), 106 (photo); Stenroos et al. (2011), 477 (photo, as U. dasypoga); Valcárcel et al. (2003), 370-1 (photo); Hinds & Hinds (2007), 495 (photo); Brodo et al. (2001), 718 (photo); McCune & Geiser (2009), 359 & 367 (photos).

Holien & Tønsberg (2008), 69 (photo), previously taken to represent this species, is referred by Clerc, in Nordic Lichen Flora 4 (2011), to the recently described U. cylindrica. The name U. dasopoga (as "dasypoga") is now considered the correct name for this species and replaces the name U. filipendula in recent literature.


Usnea filipendula
Usnea filipendula
On Larch (Larix), Gleniffer Braes, Renfrewshire, February 2009
Usnea filipendula
On Birch (Betula), Aberfoyle, Stirlingshire, March 2009

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© A.J. Silverside
Uploaded February 2009, last updated January 2016