Roccellographa circumscripta Roccellaceae
Roccellographa circumscripta
(Peterjamesia circumscripta, Sclerophytomyces circumscriptus)

Growth type crustose. BLS conservation evaluation: NS
Chemical results: K-, C-, KC+ pale yellow, P+ yellow-orange, UV-. Photobiont Trentepohlia

Coastal, in dry shady underhangs of sheltered acidic rocks, intolerant of direct wetting by sea spray or rain

Thin, whitish or grey-mottled, scurfy thallus (scratching orange-yellow), finely cracked and surrounded by grey-black prothallus. Numerous dot-like apothecia, discs black and often densely pruinose. Spores 17-26 x 5-6 Ám

Similar: Ingaderia sorediata (Peterjamesia sorediata)


Roccellographa circumscripta


Roccellographa circumscripta
Roccellographa circumscripta
On chert, Portland, Dorset. February 2016

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