Lepraria vouauxii (Hue) R.C. Harris

in Egan, Bryologist, 90: 163, 1987. Basionym: Crocynia vouauxii Hue - Bull. Soc. Bot. France, 71: 392, 1924.
Synonyms: Crocynia arctica Lynge; Lepraria arctica (Lynge) Wetmore; Leproloma vouauxii (Hue) J.R. Laundon
Description: Thallus leprose, cottony, 0.2-0.4 mm thick, forming obscurely lobed rosettes to irregularly delimited or diffuse, composed of a mass of powdery granules, pale yellowish-grey or pale cream-coloured, usually with a yellowish tinge. Granules ecorticate, soredia-like, 30-80(-180) µm wide, rarely gathered in up to 300 µm wide aggregates, without or with short projecting hyphae. Medulla white, weakly developed, the hyphae 2-4 µm thick, anastomosing, most often covered in numerous colourless crystals; lower side of thallus sometimes with orange-brown hyphae forming a weakly developed hypothallus reacting K+ purple-red. Photobiont chlorococcoid, the cells globose, up to 20 µm in diam. Spot tests: K- or K+ dirty yellow to orange, C- or C+ dirty orange, KC-, P- to P+ orange or yellow-orange, UV-. Chemistry: pannaric acid-6 methylester, rarely atranorin and roccellic acid, with or without pannaric acid.
Growth form: Leprose
Substrata: bark and 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: rare
Subalpine belt: rather rare
Montane belt: rather common
Dry submediterranean belt: common
Humid submediterranean belt: rather common
Padanian area: rather common

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Rarity

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Predictive map

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32774)
2001/12/13


Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=695&lang=en
France, Cap de la Chèvre


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=695&lang=en
France, Cap de la Chèvre


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=695&lang=en
France, Pointe de Dinan


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=695&lang=en
France, Pointe de Dinan


P.L. Nimis CC BY-SA 4.0
TSB 35716


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=695&lang=en
France, Pointe de Dinan