ITALIC 8.0

Rhizocarpon papillatum Vězda & Poelt

in Vězda, Lich. Sel. Exs., Fasc. 35: 3. no. 859, 1970.

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, areolate, yellow-green, forming up to 2(-3) cm wide patches delimited by a dark prothallus, the areoles 0.2-0.3 mm wide, contiguous or dispersed on a black hypothallus, the central ones round to angular, sslightly convex, bearing 0.2-0.5 mm wide and up to 0.8 mm tall isidioid papillae which are apically decorticated and turn blackish when old, the marginal areoles weakly elongated and radiating. Medulla white, I+ blue. Apothecia unknown. Photobiont chlorococcoid. Spot tests: medulla K+ yellow, C-, KC-, P-. Chemistry: cortex with rhizocarpic acid; medulla with unknown substances.

Note: on siliceous rocks in wind-exposed sites; so far only known from the high alpine belt in Switzerland (Silvretta Range). To be looked for in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)

pH of the substrata:

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5

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Detail from: https://gzu.jacq.org/GZU000291965

GZU000291965 - Poelt,Josef & Vězda,A. Vězda, A.: Lichenes Selecti Exsiccati 859 Date 1967-08-08 Location Switzerland / Graubünden Label Helvetia – Graubünden: Vallis Fenga, in transitu "Heidelberger Scharte" ; Alt. 2820 m Habitat Ad saxa gneissacea, locis ventis solisque expositis