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Hypotrachyna taylorensis (M.E. Mitch.) Hale
 
(= Parmelia taylorensis M.E. Mitch.)


Thallus foliose, light grey, lobes rounded or rather square at the tips and with side-lobes curved around to enclose the sinuses, edges turned down and tinged tan-brown, surface initially smooth but in older lobes becoming obscurely reticulate and readily abrading, with production of numerous lobules, undersurface black, dark brown at margins, with repeatedly branched rhizines, soralia absent; apothecia rare. Lobes overlap and have been described by Dobson (2005, 2011) as "like ripples of waves on a sandy beach". Very local in high rainfall areas of western Britain, on mossy trunks and rocks, generally in ancient woodland.

Refs: Smith et al. (2009), 442; Purvis et al. (1992), 431 (as Parmelia); Dobson (2005), 195 (photo); Dobson (2011), 200 (photo); Jahns (1983), 196-7 (photo, as Parmelia); Lichen Atlas of the British Isles 1: 1023 (1995) (as Parmelia).

Hypotrachyna taylorensis colony
Hypotrachyna taylorensis
Hypotrachyna taylorensis
On base of old Birch (Betula pubescens) trunk, Craighouse, Jura, May 2011 (BLS meeting).
 
Hypotrachyna taylorensis colony
Hypotrachyna taylorensis
Hypotrachyna taylorensis
On humid, mossy rocks in open woodland, Ty Canol, Pembrokeshire, May 2009.


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Uploaded December 2011, last updated May 2012