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Ramalina cuspidata (Ach.) Nyl.


Thallus tufted, erect to more or less pendant, blackened right at the base, ivory in colour with small but conspicuous black pycnidia, branches narrow, flattened or ± rounded in cross section; apothecia frequent, rather button-like on the narrow branches. Generally on base-poor, coastal rocks, locally abundant where there is suitable habitat.

Refs: Smith et al. (2009), 784; Purvis et al. (1992), 528; Dobson (2005), 382; Dobson (2011), 385 (photo); Dalby & Dalby (2005), 25 (illustration); Whelan (2011), 137 (photo); Valcárcel et al. (2003), 332-3 (photo).

Easily confused with R. siliquosa, with which it may be inter-mixed. The common name "Sea Ivory" is considered to apply to R. siliquosa, but in fact the present species is smoother and more ivory-like and may well have been the original Sea Ivory, inasmuch as the two species would have been distinguished.

 
Ramalina cuspidata, with apothecia
Ramalina cuspidata
Ramalina cuspidata
Exposed coastal rocks, Bettyhill, Sutherland, August 2006


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Uploaded July 2008, last updated May 2012