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Images of British Lichens

Punctelia jeckeri (Roum.) Kalb
(= P. ulophylla (Ach.) Herk & Aptroot)

Thallus foliose, grey-green when fresh, tinged brown and usually pruinose (lens needed) at the slightly upturned margins, grey when dry, underside pale brown, inner lobes developing marginal soralia, lobe surfaces with scattered, white dots (pseudocyphellae) that later also develop into soralia; apothecia apparently unknown. Evidently widespread and locally common on a variety of trees, but not distinguished from P. subrudecta until relatively recently.

Refs: Van Herk & Aproot (2000) Lichenologist 32: 233-246 (photos, detailed descriptions, as P. ulophylla); Smith et al. (2009), 770; Dobson (2005), 375-6 (photo, as P. ulophylla); Dobson (2011), 378 (photo); Whelan (2011), 135 (photo); van Haluwyn et al. (2009), 102-3 (photo); van Herk & Aptroot (2004, 2013), 326-7 (photo, as P. ulophylla, printed with green cast in my copies); Nordic Lichen Flora (2011) 4: 103, 165 (photo); Wirth (1995), 2: 667 (photo, as Parmelia subrudecta, but this species fide Van Herk & Aptroot); Wirth et al. (2004), 98 (photo, as Parmelia subrudecta but same photograph as previous reference); Wirth, Hauck & Schulz (2013), 2: 808, 959 (photo); Frahm et al. (2010), 147 (photo).

Punctelia jeckeri, damp
Damp material after snow melt, on Oak (Quercus robur), Wicken Fen, Cambridgeshire, February 2010
Punctelia jeckeri, dry
Dry material on Grey Sallow (Salix cinerea subsp. cinerea), Wicken Fen, Cambridgeshire, April 2007

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© A.J. Silverside
Uploaded March 2010, last updated December 2013