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Alan Silverside's Lichen Pages
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.
Compare Peltigera collina (thallus polyphyllous, undersides of lobes with rhizines); Nephroma parile (thallus polyphyllous, undersides of lobes scarcely tomentose, lacking cyphellae).
Refs: Smith et al. (2009), 867; Purvis et al. (1992), 584; Dobson (2005), 419 (photo); Jahns (1983), 244-5 (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); Lichen Atlas of the British Isles 3: 1368 (1998).
On mossy trunk, Glen Tilt, Perthshire, April 2008
On willow (Salix) in swampy woodland, Stackpole, Pembrokeshire, May 2009
The black spots are a parasitic fungus, Abrothallus welwitschii.
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Uploaded December 2009, last modified June 2010
