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Images of British Lichens

Leptogium gelatinosum (With.) J.R.Laundon

Thallus variable, gelatinous, papery when dry, lobes reddish to dark brown, smooth to irregularly wrinckled, lacking isidia, margin smooth to uneven or somewhat ragged, not fimbriate; apothecia frequent, smooth, coloured as the lobes or somewhat more orange on darker lobes. Widespread and locally frequent amongst mosses on rocks, walls, soil and sometimes tree-bases, in calcareous situations.

Refs: Smith et al. (2009), 546; Purvis et al. (1992), 354 (in major part); Dobson (2011), 254 (photo only); Whelan (2011), 109 (in major part) (photo); Nordic Lichen Flora (2007) 3: 35, 185 (photo); van Herk & Aptroot (2004, 2013), 238-9 (photo); Aptroot et al. (2011), 130 (photos); Wirth (1995), 2: 548-9 (photo); Wirth, Hauck & Schulz (2013), 2: 690, 694 (photo); Holien & Tønsberg (2008), 130 (photo); Arup et al. (1997), 184 (photo); Valcárcel et al. (2003), 236-7 (photo); Brodo et al. (2001), 405 (photo).

The similar lichen with fimbriate lobe-margins, previously confused with L. lichenoides, is now separated as L. pulvinatum.

Leptogium gelatinosum
Leptogium gelatinosum, close-up
Thallus lobes with more or less entire margins, Kindrogan, Perthshire, March 2008
Leptogium gelatinosum with apothecia, close-up
Close-up of thallus with apothecia, Glen Tilt, Perthshire, April 2008

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Uploaded September 2008, last updated January 2014