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Description

provided by The lichen genus Psora LifeDesk

Squamules: up to 5 mm wide, rounded, adnate, dispersed to adjacent, usually concave; upper surface: castaneous brown, shiny, epruinose, smooth or sparingly fissured; margin: concolorous with upper side, down-turned, entire or lobed; upper cortex: up to 60-80 μm thick, composed of thin-walled hyphae with round lumina, not containing crystals of lichen substances or calcium oxalate; medulla: containing crystals of lichen substances but no calcium oxalate; lower cortex: of mainly periclinally oriented hyphae, not containing calcium oxalate; lower surface: white to pale brown; Apothecia: up to 1 mm diam., marginal, immarginate even when young, black, epruinose; ascospores: 8-13 x 5-7 μm; Pycnidia: laminal, immersed; conidia: bacilliform, 5-7 x 1 μm; Spot tests: upper cortex K-, C-, KC-, P-; medulla K-, C+ red, KC+ red, P-; Secondary metabolites: gyrophoric acid and trace of lecanoric acid.

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Timdal, Einar
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Timdal, Einar

Diagnostic Description

provided by The lichen genus Psora LifeDesk

The species resembles some epruinose, concave forms of P. russellii but differs in having black, marginally attached apothecia and deeper castaneous brown squamules, in the absence of calcium oxalate from the medulla, and in the presence of gyrophoric acid as the only lichen substance in the thallus. In P. russellii the apothecia are dark reddish brown to dark brown and attached laminally to submarginally to the squamules, and calcium oxalate and almost always norstictic acid, sometimes also a trace of gyrophoric acid, are present in the medulla. Psora nitida also resembles P. californica in the shiny, castaneous brown squamules containing gyrophoric acid, but differs in the more isodiametrical shape of the squamules which usually have a distinct central depression, in the marginally attached apothecia, absence of bourgeanic acid, and in the location of the gyrophoric acid in the thallus. In P. nitida this substance is restricted to the medulla, in P. californica to the upper cortex.

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Timdal, Einar
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Timdal, Einar

Distribution

provided by The lichen genus Psora LifeDesk

Baja California del Norte.

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Timdal, Einar
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Timdal, Einar

Habitat

provided by The lichen genus Psora LifeDesk

On soil in Vizcaino subdivision of Sonoran desert, often in hillsides, up to 400 m alt.

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Timdal, Einar
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Timdal, Einar

Look Alikes

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Psora californica, Psora russellii.

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Timdal, Einar
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Timdal, Einar

Psora nitida ( Szl )

provided by wikipedia SZL

Psora nitida je porost[1], co go ôpisoł Timdal. Psora nitida nŏleży do zorty Psora i familije Psoraceae.[2][3] Żŏdne podgatōnki niy sōm wymianowane we Catalogue of Life.[2]

Przipisy

  1. Timdal (1987) Bryologist, Vol.: 89 Issue: 4 p. 267
  2. 2,0 2,1 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.): Species 2000 & ITIS Catalogue of Life: 2019 Annual Checklist.. Species 2000: Naturalis, Leiden, the Netherlands., 2019. [dostymp 24 września 2012].
  3. LIAS: A Global Information System for Lichenized and Non-Lichenized Ascomycetes. Rambold G. (lead editor); for detailed information see http://liaslight.lias.net/About/Impressum.html and http://liasnames.lias.net/About/Impressum.html, 2019-03-09
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Psora nitida: Brief Summary ( Szl )

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Psora nitida je porost, co go ôpisoł Timdal. Psora nitida nŏleży do zorty Psora i familije Psoraceae. Żŏdne podgatōnki niy sōm wymianowane we Catalogue of Life.

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