ITALIC 7.0

Rhizocarpon geographicum subsp. kittilense (Räsänen) Ahti

Norrlinia, 17: 57, 2008. Basionym: Rhizocarpon kittilense Räsänen - Ann. Bot. Soc. Zool.-Bot. Fenn. Vanamo, 19: 58, 1942.

Synonyms: Rhizocarpon lindsayanum subsp. kittilense (Räsänen) Runemark; Rhizocarpon olivetorum Räsänen; Rhizocarpon riparium Räsänen

Distribution: N - Piem, VA, Emil (Fariselli & al. 2020).

Description: Thallus crustose, greyish-green to yellow-green, areolate, forming patches 5-10 cm in diam., delimited by a black prothallus. Areoles contiguous, round to angular, 0.6-2.5 mm wide, flat to slightly convex, smooth, epruinose, usually subdivided by numerous cracks. Cortex 25-40 µm thick, without distinct structure, with abundant small crystals not soluble in K; medulla white, I+ blue. Apothecia frequent, lecideine, arising between the areoles, round, 0.6-2.5 mm across, with a black, weakly concave to weakly convex, epruinose disc, and a very thin, usually persistent and slightly raised, sometimes finally excluded, black proper margin. Proper exciple pale brown to brownish red; epithecium brown, K-; hymenium 120-200 µm thick, colourless to greenish, K/I+blue, K+ greenish; paraphysoids strongly conglutinated, richly branched and anastomosing, sometimes slightly capitate; hypothecium dark brown, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, soon becoming dark green to brown, ellipsoid, 24-40 x 11-15 µm, halonate. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC- , P- or P+ yellow. Chemistry: cortex with rhizocarpic acid; medulla with psoromic acid.

Note: on steeply inclined surfaces of siliceous rocks in rather sheltered and humid situations, from the subalpine to the nival belt.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather rare

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

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5

(info)

Solar irradiation:

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5

(info)

Aridity:

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5

(info)

Eutrophication:

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5

(info)

Poleotolerance:

0

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3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF