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Sticta sylvatica (Huds.) Ach.


Mature thallus of multiple lobes (as distinct from grouped, single lobes), grey to grey-brown, surface conspicuously isidiate along an obscure network of ridges, margins not sorediate, under-surface brownish-tomentose, with scattered, white or pale cyphellae (breaks in the lower cortex); apothecia unknown. On mossy trees and rocks, mostly in the west and generally in old, humid forest. Compare S. fuliginosa.

Refs: Smith et al. (2009), 867; Purvis et al. (1992), 584; Dobson (2005), 420 (photo); Dobson (2011), 425 (photo); Jahns (1983), 242-3 (photo); Whelan (2011), 143 (photo); van Haluwyn et al. (2009), 54-5 (photo); Valcárcel et al. (2003), 356-7 (photo); Moberg & Holmåson (1984), 184 (photo); Nordic Lichen Flora (2007) 3: 86, 208 (photo); Wirth (1995), 2: 884-5 (photo); Hansen & Andersen (1995), 65 (photo); Thor & Arvidsson (1999), 330 (photo), 493; Lichen Atlas of the British Isles 3: 1369 (1998).

Sticta sylvatica, showing cyphellae
Sticta sylvatica
Sticta sylvatica, habitat
On willow (Salix) in swampy woodland, Stackpole, Pembrokeshire, May 2009
 
Sticta sylvatica, young thallus
Young thallus (resembling S. fuliginosa) on willow (Salix) in swampy woodland, Stackpole, Pembrokeshire, May 2009
 
Sticta sylvatica
On Sycamore (Acer pseudoplatanus), Ardanaiseig, Argyllshire, December 2009
 
Sticta sylvatica, isidia
Sticta sylvatica, cyphellae
Isidia (upper photograph), cyphellae (lower photograph), Talisker, Skye, October 2011


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© A.J. Silverside
Uploaded December 2009, last updated October 2013