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Sticta limbata (Sm.) Ach.


Thallus foliose, grey to grey-brown, drying buff-brown, lobes individual but generally with several grouped together, irregularly indented and with sorediate margins, under-surface brownish-tomentose, with scattered, pale cyphellae (breaks in the lower cortex); apothecia rare. On mossy trees and rocks, mostly in the west and generally in parkland or old forest.

Refs: Smith et al. (2009), 867; Purvis et al. (1992), 584; Dobson (2005), 419 (photo); Dobson (2011), 425 (photo); Jahns (1983), 244-5 (photo); Whelan (2011), 143 (photo); van Haluwyn et al. (2009), 86-7 (photos); Valcárcel et al. (2003), 354-5 (photo); Holien & Tønsberg (2008), 117 (photo); Nordic Lichen Flora (2007) 3: 85, 208 (photo, shows the cyphellae well); Thor & Arvidsson (1999), 329 (photo), 492; Brodo et al. (2001), 672, 673 (photo); McCune & Geiser (2009), 328 (photo); Lichen Atlas of the British Isles 3: 1368 (1998).

Compare Peltigera collina (thallus polyphyllous, undersides of lobes with rhizines); Nephroma parile (thallus polyphyllous, undersides of lobes scarcely tomentose, lacking cyphellae).

Parasitised by the lichenicolous fungus, Abrothallus welwitschii.

Sticta limbata
Sticta limbata
On old, fallen Goat Willow (Salix caprea), Erskine, Renfrewshire, June 2012
 
Sticta limbata
On mossy trunk, Glen Tilt, Perthshire, April 2008
 
Sticta limbata, parasitised
On willow (Salix) in swampy woodland, Stackpole, Pembrokeshire, May 2009. The black spots are Abrothallus welwitschii.


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Uploaded December 2009, last updated October 2013