Images of British Lichens
Ramalina polymorpha (Lilj.) Ach.
|Very similar to R. siliquosa, with strap-shaped branches, but a rich green when fresh, drying ash-grey, branch tips often lacerate, surfaces with numerous, longitudinal pseudocyphellae containing corticate granules; apothecia rarely produced. A nationally rare species, but very locally abundant in just a few localities on tops and sides of coastal rocks in the vicinity of seabird colonies, also on exposed basalt outcrops.
Refs: Smith et al. (2009), 786; Purvis et al. (1992), 528; Dobson (2011), 387 (photo); Jahns (1983), 230-231 (photo, no. 539 only, not 542, which is R. capitata); Moberg & Holmåson (1984), 162 (photo, habitat); Stenroos et al. (2011) 402 (photo).
|On seabird-nutrient-enriched coastal rocks, Skomer, Pembrokeshire, May 2009|
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Uploaded July 2009, last updated August 2013