Lecanora rouxii S. Ekman & Tønsberg

in Grube & al., Mycol. Res., 108: 12, 2004.
Synonyms: Lepraria flavescens Cl. Roux & Tønsberg; Lepraria flavescens Clauzade & Cl. Roux nom. inval.
Distribution: N - Ven (Nascimbene 2003, 2004, 2005c, Baruffo & al. 2006). C - Marc (Nimis & Tretiach 1999, Baruffo & al. 2006), Abr (Nimis & Tretiach 1999).
Description: Thallus leprose, episubstratic, whitish to cream-coloured, clearly delimited, usually rosette-forming, often falling off in the central parts, consisting of a soft mass of soredia-like granules. Medulla white, well-developed and thick. Apothecia and pycnidia not known. Photobiont chlorococcoid. Spot tests: K+ yellow, C+ bright yellow, KC+ yellow-orange, P+ yellow. Chemistry: atranorin, eugenitol, flavescin, sordidone and 4 unknown substances.
Note: on vertical to underhanging surfaces of weathered or fissured calcareous rocks seldom wetted by rain, often in woodlands, mostly in natural habitats; certainly more widespread. According to Grube & al. (2004) the species is closely related to Lecanora swartzii.
Growth form: Leprose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: rather rare
Submediterranean belt: rather rare
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent


pH of the substrata:

(info)

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5

Solar irradiation:

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5

Aridity:

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5

Eutrophication:

(info)

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5

Poleotolerance:

(info)

0

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3

Altitudinal distribution:

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5




P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32754)
2001/12/13


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32754)
2001/12/13
thallus margin