Français English

Porpidia tuberculosa (Sm.) Hertel & Knoph

Synonyms:

Family: PORPIDIACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, cracked to areolate, areoles smooth or slightly rugose and sometimes minutely papillate, grey-bluish, cream-grey, often with orange sections, more or less covered with slightly eroded soralia, scattered or clustered, round or irregular, 0.1-1 mm diam., soredia farinose to granulose, pale grey to grey-bluish, sometimes scoured and leaving a grey-bluish scar, prothallus dark brown, mostly distinct in case of contiguous colonies. Apothecia rare or in limited number, in small clusters of 2-4, rounded, 0.5-1.5 mm diam., immersed in the thallus at first then sessile, disc flat to slightly convex, often with minute warts, black, sometimes tinged blue owing to pruine, exciple thick, black. Ascospore simple, ellipsoid, 12-19 x 7-9 µm. Photobiont: Chlorococcoid. Medulla and soralia: C-, K-, KC-, Pd-, I+ violet. Rather common, on siliceous rocks, walls, stones, etc. N.B. This species is extraordinarily variable, including within the same colony, and may be difficult to identify in the fiel: the morphs with eroded soralia potentially resembles to Lecidea lactea which is K+ yellow > red, and the morphs with large soredia resembling to Porpidia soredizodes, K+ yellow and Pd+ orange. Fertile forms may also be compared to Porpidia cinereoatra devoid of soredia.







Porpidia tuberculosa Poullaouen
Bernard BOUFFINIER



Porpidia tuberculosa H么pital-Camfrout 1
Bernard BOUFFINIER



Porpidia tuberculosa H么pital-Camfrout
Alain GERAULT



Porpidia tuberculosa f. pourpre Roc Tr茅dudon
Alain GERAULT



Porpidia tuberculosa H么pital-Camfrout 2
Alain GERAULT



Porpidia tuberculosa Fort de la Fraternit茅
Alain GERAULT



Porpidia tuberculosa H么pital-Camfrout 2
Bernard BOUFFINIER



Porpidia tuberculosa H么pital-Camfrout 3
Jo毛l QUERELLOU



Porpidia tuberculosa H么pital-Camfrout 4
Jo毛l QUERELLOU



Porpidia tuberculosa Ardennes
Jacques HAINE



Porpidia tuberculosa Fertile Cauteret 1
Bernard BOUFFINIER



Porpidia tuberculosa Fertile Cauterets
Bernard BOUFFINIER



Porpidia tuberculosa H么pital-Camfrout 5
Bernard BOUFFINIER



Porpidia tuberculosa Asque Bleu Coton Ardennes 2
Jacques HAINE



Porpidia tuberculosa Spores Ardennes 3
Jacques HAINE



Porpidia tuberculosa fertile Corse Zonza 1
Bernard BOUFFINIER



Porpidia tuberculosa Thalle fertile et thalle infertile Corse Zonza 2
Bernard BOUFFINIER



Porpidia tuberculosa fertile Corse Zonza 3
Bernard BOUFFINIER



Return
Content : Alain Gérault - Website development : Sylvain Ard - Hosting : Online.net