Usnea cavernosa Tuck.
in Agassiz, Lake Superior: 171, 1850.
Synonyms: Usnea arnoldiana Zahlbr.; Usnea microcarpa Arnold
Description: Thallus fruticose-filamentous, greenish, flaccid and pendulous, up to 60 cm long, branching isotomic-dichotomously with distinctly parallel branches. Main branches uneven in thickness, conspicuously foveolate and weakly ridged, sometimes with annular cracks, often with thin, fusiform-elongate pseudocyphellae, pale at base, without or with very few papillae, tubercles and fibrils; lateral branches not constricted at attachment point, usually without fibrils, very rarely with scarce, irregularly distributed, 1-3(-5) mm long fibrils. Soralia and isidiomorphs absent. Cortex smooth, thin (3-5 % of branch thickness), shiny in longitudinal section, with thin transverse cracks; medulla white, dense, thick (27-32 %); central axis white, often sinuous (23-35 %). Apothecia not observed in Italian material. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC-, P-; medulla K+ red or rarely K-, C-, KC-, P+ yellow to orange or rarely P-. Chemistry: cortex with usnic acid; medulla with salazinic acid as a main substance or (very rarely) without medullary substances.
Growth form: Fruticose filamentous
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: rare
Montane belt: rather rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Tiiu Tõrra Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Growth form: Fruticose filamentous
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: rare
Montane belt: rather rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Tiiu Tõrra Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Tiiu Tõrra; Owner: Tiiu Tõrra - Institute of Ecology and Earth Sciences, University of Tartu, Estonia
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Usnea_cavernosa.htm
France, 18/9/2011 - sur pin - Champigny-le-Haut - Savoie
