Stereocaulon condensatum Hoffm.

Deutschl. Fl., 2: 130, 1796.
Synonyms: Stereocaulon acaulon Nyl.; Stereocaulon condensatum f. septentrionale H. Magn.; Stereocaulon condyloideum Ach.; Stereocaulon paschale var. condensatum (Hoffm.) Schaer.
Description: Primary thallus persistent, of granular to incised-elongate phyllocladia with abundant interspersed cephalodia, forming a crust. Pseudopodetia rarely present, with a solid cartilaginous axis of parallel hyphae surrounded by a lax medulla, ascending to erect, terete, up to 1.5(-2.5) cm tall, 0.5-1 mm thick, simple or sparingly branched, tomentose at least in upper parts. Phyllocladia small, wart-like to incised, horizontal, greyish white to beige. Cephalodia abundant, dark reddish brown to blackish brown, with a scabrid surface, 1-1.5 mm across (those on the basal phyllocladia) or 0.2-0.5 mm across (those on the pseudopodetia), containing Stigonema, located between primary thallus granules or at the base of pseudopodetia. Apothecia rare, dark brown, 1-2 mm across, rounded, without a thalline margin, on the basal phyllocladia or terminal on the pseudopodetia. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless; paraphyses simple, 1-1.5 µm thick, the apical cells up to 4 µm wide, with a dark cap; hypothecium colourless. Asci 8-spored, cylindrical-clavate, with a K/I+ blue outer layer and apical dome, and a central, K/I+ darker blue tube, Porpidia-type. Ascospores mainly 3-septate, hyaline, cylindrical-fusiform, 22-40 x 2.5-3 µm. Pycnidia dark, immersed in the basal phyllocladia. Conidia thread-like, straight or slightly curved, 5-6 x c. 0.8 µm. Main photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC- or KC+ violet (reaction often difficult to observe macroscopically, best evident on acetone extract on filter paper!), P+ faintly yellow or more rarely P-, UV+ blue-white. Chemistry: atranorin and variable amounts of lobaric acid.
Growth form: Fruticose

Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia (primary); cyanobacteria, filamentous (e.g. Nostoc, Scytonema) (secundary, e.g. in cephalodia)
Reproductive strategy: mainly sexual
Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: rare
Montane belt: extremely rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

pH of the substrata:

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Poleotolerance:

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Altitudinal distribution:

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Rarity

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Predictive map

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (15131)
2003/03/06


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (15131)
2003/03/06


Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017
as v. tilesii


Pier Luigi Nimis CC BY-SA 4.0
TSB 41159


Felix Schumm - CC BY-SA 4.0
[VZ2475], Polonia. Distr. Byalystok. prope pagum Jelonka, 160 m. Ad terram arenosam in Pineto. Leg. S. Cie li ki, K. Czyzewska, A. Lackovi ová er I. Pisút, 15.09.1990. Ex A. V ZDA: LICHENS SELECTI EXSICCATI NR. 2475.


Felix Schumm - CC BY-SA 4.0
[VZ2475], Polonia. Distr. Byalystok. prope pagum Jelonka, 160 m. Ad terram arenosam in Pineto. Leg. S. Cie li ki, K. Czyzewska, A. Lackovi ová er I. Pisút, 15.09.1990. Ex A. V ZDA: LICHENS SELECTI EXSICCATI NR. 2475.


Felix Schumm - CC BY-SA 4.0
[VZ2475], Polonia. Distr. Byalystok. prope pagum Jelonka, 160 m. Ad terram arenosam in Pineto. Leg. S. Cie li ki, K. Czyzewska, A. Lackovi ová er I. Pisút, 15.09.1990. Ex A. V ZDA: LICHENS SELECTI EXSICCATI NR. 2475.


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Leinburg


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Röthenbach


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Röthenbach


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
in opp. Tregnago ad saxa Basaltica M. Belocca 1855


Triin Aimla; Owner: University of Tartu


Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.