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Umbilicaria proboscidea (L.) Schrad.


Thallus attached at central point, lacking isidia, grey to dark brown above, centre generally slightly domed and with a network of white-pruinose ridges, margins ascending, lacking cilia, lower surface grey to dark brown, smooth or with sparse rhizinomorphs (non-attaching rhizines), thalloconidia absent; apothecia black, multiply-infolded (gyrose). Local on exposed, usually montane, siliceous rocks and boulders in the north and west.

Refs: Krzewicka (2004), 63; Smith et al. (2009), 917; Purvis et al. (1992), 619; Dobson (2005), 437; Dobson (2011), 444; Jahns (1983), 228-229 (photo); Wirth, Hauck & Schulz (2013), 2: 1121, 1128 (photo); Moberg & Holmåson (1984), 155 (photo); Holien & Tønsberg (2008), 100 (photo); Stenroos et al. (2011), 468-9 (photo); Hansen & Anderson (1995), 69 (photo); Hinds & Hinds (2007), 485 (photo); Brodo et al. (2001), 707 (photo); Pope (2005), 41 (photo).

Umbilicaria proboscidea
Umbilicaria proboscidea
Umbilicaria proboscidea
Umbilicaria proboscidea, close-up showing apothecia
With other Umbilicaria spp. on exposed, siliceous, glacial-erratic, moorland boulder, Loch Eriboll, West Sutherland, July 2012


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Uploaded August 2012, last updated September 2013