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Lathagrium auriforme (With.) Otalora, P M. Jorg & Wedin

Synonyms:

Lathagrium auriforme (With.) Otalora, P M. Jorg & Wedin

Collema auriculatum Hoffm.

Collema auriforme (With.) Coppins & J. R. Laundon



Family: COLLEMATACEAE

Habitat: Ubiquitous

Description

    Thallus 3-10 cm diam., foliose, made of wiggly lobes to 1 cm wide, rather thick, notably swollen and pulpy (0.5 mm thick) when wet,  ± erected, upper surface smooth, brown-greenish, dark olive-green, covered with isidia often numerous, crowded, globose (like pearls 0,2-0,8 mm diam.), clustured in dense groups and potentially covering the whole thallus center. Apothecia rare, 2-3 mm diam., disc brown-red, thalline exciple thin and isidiate. Ascospores ellipsoid to oval, submuriform, 26-36 x 8-13 µm. Photobiont : Nostoc. Chemical spot tests negative. Not especially maritime, rare, on calcareous rocks and soils and consequently in our region restricted to coastal quarries used to feed lime-kiln.  N.B. See Lathagrium (Collema) fuscovirens that displays less thick lobes, and less swollen when moist.*

 







Collema auriforme Le Fret Le Four à Chaux
Bernard BOUFFINIER



Collema auriforme Le Fret 2
Bernard BOUFFINIER



Collema auriforme Le Fret 3
Bernard BOUFFINIER



Collema auriforme Le Fret 4
Bernard BOUFFINIER



Collema auriforme Le Fret 1
Bernard BOUFFINIER



Collema auriforme Roscanvel 1
Bernard BOUFFINIER



Collema auriforme Roscanvel 2
Bernard BOUFFINIER



Collema auriforme Roscanvel 3
Bernard BOUFFINIER



Collema auriforme Roscanvel 4
Bernard BOUFFINIER



Collema auriforme Roscanvel 5
Bernard BOUFFINIER



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