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Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens (Huds.) J. R. Laundon

Synonyms:

Variospora flavescens (Huds.) Arup, Frödén & Sochting

Placodium flavescens (Huds.) A. L. Sm.



Family: TELOSCHISTACEAE

Habitat: Ubiquitous

Description

   Thallus rosette shaped, 3-8 cm; lobes  closely appressed, narrow, contiguous to pleated, smooth to faintly rugose, convex,  lobe-ends not widened,  surface matt, orange  to yellow-orange with frequently a white-whitish ring shaped zone, sometimes the center vanishes or displays a new growth zone. Apothecia often numerous, clustured in the thallus center, to 1-1.5 mm diam., disc plane to slightly convex, orange (often brown-orange to the center), margin faintly paler. Ascospores polarilocular, lemon-shaped, 1-septate, 12-15 x 8-10 µm. Photobiont : trebouxioide. All parts K+ purple. Not specifically maritime, common on the seashore on old walls and nutrient-rich calcareous stones and rocks where it is mixed with other matitime species inducing a possible confusion with notably Caloplaca thallincola. On calcareous rocks, see also taxa of Caloplaca saxicola group, which lobes are short and powdery, and Caloplaca aurantia with flattened lobes towards the margin.






Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens La Palue
Alain GERAULT

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Le Passage
Alain GERAULT

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Saint Herbot
Michel DAVID

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Asques K Argol 3
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Ile d'Aix 2
Joƫl QUERELLOU

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Brest
Joƫl QUERELLOU

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens avec Opegrapha chevallieri Mur Brest 2
Joƫl QUERELLOU

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Mur Brest 3
Joƫl QUERELLOU

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Argol 1
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Coupe apothƩcie Eau Belgique Nismes 2
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Argol 2
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Asque Bleu Coton Belgique Nismes 4
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Asques Lugol Belgique Nismes 5
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Spores Bleu Coton Belgique Nismes 6
Jacques HAINE

Caloplaca flavescens (Huds.) J. R. Laundon

Caloplaca flavescens Spores Lugol Belgique Nismes 7
Jacques HAINE



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