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Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa (Hoffm.) Rabenh.

Synonyms:

Family: LECANORACEAE

Habitat: Ubiquitous

Description

   Thallus rarely continuous and most often formed of areoles scattered on the substrate, particularly in the crevices, areoles with rounded margin, smooth and flat, grey-yellowish, grey-greenish, grey-brownish, more or less obvious black hypothallus. Apothecia numerous, scattered or grouped against each other which has the effect of deforming them, slightly, sessile and constricted at the base, 0.3-1 mm in diameter, disc smooth, flat then slightly convex, pale yellowish, green -brownish, greenish-yellow, jade, thin margin, paler than the disc, distinct then excluded or crenulated or sinuous. Spores simple, elliptical, 10-14 x 5-6.5 µm. Photobiont: Trebouxia. Thallus: C-, weak yellow K+, yellow KC+, P-. Species not especially maritime but very common on acid rocks from the xeric zone, also common on the walls of maritime structures.

N.B. Lecanora stenotropa is a similar species with a darker thallus, brownish disc apothecia and especially narrower spores: 8-12 x 3-4 µm.

N.B. Some forms with a greenish disc can be confused with Lecanora intricata whose areoles have a serrated margin and whose apothecia are less sessile, but these two species are sometimes impossible to separate because of the unreliable characters and crosses selected to determine them.





Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Pointe du Van
Alain GERAULT

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Plogoff 1
Bernard BOUFFINIER

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Roc'h an Daol 1
Bernard BOUFFINIER

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Monthermé
Jacques HAINE

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Roc'h Trédudon
Michel DAVID

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Roc'h an Daol 2
Bernard BOUFFINIER

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Plogoff 2
Bernard BOUFFINIER

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Plogoff 3
Bernard BOUFFINIER

Lecanora polytropa (Hoffm.) Rabenh.

Lecanora polytropa Plogoff 4
Bernard BOUFFINIER



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