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Mushroom Observer Image 23030: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 153197: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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The lichen at center (and scattered on the bark of this tree) with the orange fruiting bodies (apothecia) is Xanthomendoza montana (syn. Xanthoria montana). It is sensitive to sulfur dioxide and can be used to monitor air pollutions. Thallus growth rate is in the 5 to 7 mm per year range.Most, but not all, species of Xanthomendoza grow on tree bark.There are at least another four to five species here including a gray foliose species (left-center).Oct. 19, 2012, Salt Lake County foothills, approx. 4850 ft. elev., growing on Quercus gambelii, Gambel's oak.
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The lecanorine apothecia of Xanthomendoza fallax are less commonly seen and often absent. A few can be seen here. They are distinctive in their concave to flat shape, dull orange color and sorediate margins.The less dominant dark gray-brown (in this very dry state) lichen that is growing here with the sunburst lichen is I believe Phaeophyscia orbicularis. The two seem to be common bedfellows.Feb. 2, 2013, growing on the bark of mature and arborescent Quercus gambelii, full southern exposure, Salt Lake County, Utah, approx. 4,350 ft. elev.
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Mushroom Observer Image 23031: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 214344: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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The lecanorine apothecia of Xanthomendoza fallax are less commonly seen and often absent. A few can be seen here. They are distinctive in their concave to flat shape, dull orange color and sorediate margins.The less dominant dark gray-brown (in this dry state) lichen that is growing here with the sunburst lichen is I believe Phaeophyscia orbicularis. Some of its dark brown apothecia can be seen here as well. The two seem to be common bedfellows.Feb. 2, 2013, growing on the bark of mature and arborescent Quercus gambelii, full southern exposure, Salt Lake County, Utah, approx. 4,350 ft. elev.
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Mushroom Observer Image 23032: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 537964: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Predominantly Xanthomendoza fallax growing on a mature trunk, here at a height of about two meters above the ground, of Quercus gambelii (one of about 75 to 100 trees in a small grove/clone of remnant Gambel's oak that are tall and drooping arborescent easily 100+ years old or much older). Very dry despite surrounding snow on the ground. The dark gray-brown lichen growing with seems to key to Phaeophyscia orbicularis.X. fallax is strongly sorediate (not all Xanthomendoza are) with soralia on the terminal ends of the lobes that produce granular soredia (vegetative means of propagation). Apothecia are less often seen with this species (I could not find any fully formed on this shaded east-facing side of the trunk - although several seem to be apparent that are forming - but did find some on some exposed oak branches that had a southwestern sun exposure).The bodies (thallus) of these lichens are very small, typically around 1 mm and their lobes are tiny, typically around 0.3 to 0.5 mm. These commonly found lichens are particularly fond of poplars. They are reportedly intermediately sensitive to sulfur dioxide and can be used as air quality bioindicators.Feb. 2, 2013, Salt Lake County, Utah, elev. approx. 4,350 ft.
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Mushroom Observer Image 23033: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 749753: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Primarily the common Xanthomendoza fallax growing on the bark of Populus fremontii. The tree was of moderate height (30 to 40 feet tall) and age (it may not be much more than in the 20 to 25 old range). Growing by itself in an area where there are only occasionally solitary trees of this species. Only these lichens seemed to growing on it fairly extensively, no mosses, on the northeastern side of the tree. I could only find apothecia in this near the base.Feb. 23, 2013, Salt Lake County, Utah open space, approx. 4330 ft elev.
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Mushroom Observer Image 23034: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 749755: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 23035: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 82293: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 734104: Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Kondr.
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Mushroom Observer Image 82294: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 82295: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 82296: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 82297: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.
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Mushroom Observer Image 82298: Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S.Y. Kondr.