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Thick, warted, creamy-white or greyish thallus. White prothallus with zoned 'growth-rings' near thickened margins. Very fertile, numerous pinkish apothecia usually with cracked white pruina.
Spotted on a granite rock.
Camera Model: NIKON D300. Exposure Time: 1/60 sec.; f/25; ISO Speed Rating: 200. Focal Length: 90.0 mm. Flash fired