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Pertusaria hymenea (Ach.) Schaer.


Thallus variable but usually thick and strongly wrinkled to warted, yellowish, or greenish grey in shade, each wart with usually a single, sunken, apothecium. Widespread and often common on tree trunks, occasional on sheltered rocks.

Refs: Smith et al. (2009), 682; Purvis et al. (1992), 455; Dobson (2005), 326 (photo); Dobson (2011), 327 (photo); Whelan (2011), 128 (photo); van Haluwyn et al. (2009), 184-5 (photo); van Herk & Aptroot (2004, 2013), 290-1 (photo); Wirth (1995), 2: 698; Wirth, Hauck & Schulz (2013), 2: 845 (photo), 846; Holien & Tønsberg (2008), 179 (photo); Valcárcel et al. (2003), 294-5 (photo); Puntillo (1996), plate 30 (photo).

 
Pertusaria hymenea
Glen Tilt, Perthshire, April 2009


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Uploaded March 2009, last updated December 2013