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Arctoparmelia incurva (Pers.) Hale
 
(= Parmelia incurva (Pers.) Fr.)


Thallus foliose, yellow to yellow-grey, lobes narrow, crowded, radiating, convex in cross section, turned under at the tips, pale brown beneath, inner lobes usually bearing large, globose, white to yellowish soralia; apothecia rare. On hard, exposed, base-poor rocks in the north and west, mainly upland.

Refs: Smith et al. (2009), 152; Purvis et al. (1992), 430 (as Parmelia); Dobson (2005), 64 (photo); Dobson (2011), 70 (photo); Jahns (1983), 196-7 (photo, as Parmelia); Moberg & Holmåson (1984), 90 (photo, as Parmelia); Nordic Lichen Flora (2011) 4: 20, 144 (photo); Stenroos et al. (2011), 60-1 (photo); Wirth (1995), 2: 644, 645 (photo, as Parmelia); Wirth, Hauck & Schulz (2013), 1: 85 & 162 (photos), 2: 1183; Hansen & Anderson (1995), 45 (photo); Hinds & Hinds (2007), 125 (photo); Lichen Atlas of the British Isles 1: 1000 (1995).

Digital photography and printing technology commonly do not reproduce the yellow colour of this lichen well. Compared with its field appearance, it is depicted too grey in the photograph below.

Arctoparmelia incurva
On pebble in exposed, coastal, dune heath, Findhorn, Morayshire, August 2010


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Uploaded May 2012, last updated September 2013