Candelariella coralliza (Nyl.) H. Magn.

    Thallus crustose, thick, markedly cracked and areolate, tips of areoles convex, made of packed coralloid granules, yellow, yellow-lemon when moist, golden yellow when dry, but never orange. Little or not fertile, apothecia to 0,6-1,5 mm diam., disc golden yellow, margin granular, paler yellow. Ascospores simple, oblong, slightly curved,  10-14 x 4,5-6 µm. Photobiont : chlorococcoïde. Thallus: K-. Not especially maritime, on nutrient-rich perching birds rocks near the sea shores and on exposed summits inland (A lignicolous form may be found on top of wood poles near the seashore, Candelariella coralliza forme lignicole, and on rocks of inland ridges . In coastal areas, observed to the naked eye, may easily be confused with taxa belonging to Caloplaca citrina group unless the K reaction is conducted; the latter species has a thinner thallus, and is also less cracked. N.B. Considered by some authors as a luxuriant morph of Candelariella vitellina what is not surprising since all the intermediate specimen between these two taxa can be found, notably in the areas where they both thrive.