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Stereocaulon dactylophyllum Flörke

Synonyms:

Family: STEREOCAULACEAE

Habitat: Ubiquitous

Description

    Primary thallus squamulose, soon disappearing, secondary thallus forming small cushions, consisting of more or less erect pseudopodetia, 2-4 cm tall, grey-greenish when moist, greyish when dry, covered with numerous granular to squamulose small protuberances (phyllocladia), 1-2 mm, coralloid (coral branch shaped) or digitated, presence of cephalodia, crust forming, grey-brownish, 0.2-0.5 mm, harbouring the photobiont: Stigonema. Apothecia usually numerous at apices of small lateral branches, 1-2 mm diam., disc flat then slightly convex, brown-red when moist, blackish when dry, exciple thin and distinct, paler (beret-like). Ascospores thinly elongate, 3-7-septate, 20-36 x 3-4 µm. Photobiont: TrebouxioidC-, K+ yellow, KC-, Pd+ orange. Not especially maritime, common on rocks, notably schists near the seashore and inland, frequent also on shaded roofs covered with thick old slates, traditional in Brittany.*







Stereocaulon dactylophyllum Brest 1
Alain GERAULT



Stereocaulon dactylophyllum Brest 2
Alain GERAULT



Stereocaulon dactylophyllum Commana 1
Alain GERAULT



Stereocaulon dactylophyllum Commana 2
Alain GERAULT



Stereocaulon dactylophyllum Morgat 1
Michel DAVID



Stereocaulon dactylophyllum Morgat 2
Michel DAVID



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