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Lepra excludens (Nyl) Hafellner

 

=Pertusaria excludens Nyl.

Synonyms:

Pertusaria excludens Nyl.



Family: OCHROLECHIACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, rather thick, markedly cracked and areolate, areoles angular, 0.2-0.5 mm across, flat or slightly convex, papillate, white-greyish, dull white, pale grey-ochre sometimes tinged with pink when exposed to seaspray, (see Lepra excludens forme rose), prothallus concolourous, inconspicuous, often with a minute bulge at margin when merging with other thalli, soralia abundant, 0.6-1.5 mm, arising from openings of rounded warts or tubercles, coarsely granular, filled with soredia, paler than the thallus or slightly yellowish when dry and greenish when moist. Apothecia scarce, hidden and arising from the soredia, often aborting. Ascospores unknown. Soralia: C-, K+ yellow > blood-red, KC+ yellow > red, Pd+ yellow-orange. On siliceous (granite) rocks in coastal areas, very seldom on rocky ridges inland (possible confusion with  Pertusaria lactescens ?). N.B. Possibly the sorediate morph of Lepra monogona that is much more scarce. See, notably far from the coasts, Pertusaria lactescens of which the chemical reactions are identical, but  with a thinner thallus and smaller isidioid-like soralia, scattered all over the thallus and not restricted to top of warts.







Pertusaria excludens Pointe du Raz 1
Bernard BOUFFINIER



Pertusaria excludens Brest 2
Joël QUERELLOU



Pertusaria excludens Carnota La Coruña 2
Antonio Valero Risoto



Pertusaria excludens Carnota La Coruña 3
Antonio Valero Risoto



Pertusaria excludens Pointe du Van 3
Bernard BOUFFINIER



Pertusaria excludens Brest 1
Joël QUERELLOU



Pertusaria excludens Pointe du Van 4
Bernard BOUFFINIER



Pertusaria excludens forme grise et rose Pointe du Van 1
Alain GERAULT



Pertusaria excludens Cap de la Chèvre 2
Bernard BOUFFINIER



Pertusaria excludens Pointe du Raz 2
Bernard BOUFFINIER



Pertusaria excludens Pointe du Raz 3
Bernard BOUFFINIER



Pertusaria excludens Pointe du Raz 4
Bernard BOUFFINIER



Pertusaria excludens Pointe du Raz 5
Bernard BOUFFINIER



Pertusaria excludens Pointe du Raz 6
Bernard BOUFFINIER



Pertusaria excludens Cap de la Chèvre 1
Bernard BOUFFINIER



Pertusaria excludens Pointe de Dinan 2
Bernard BOUFFINIER



Pertusaria excludens Cap de la Chèvre 3
Bernard BOUFFINIER



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