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| taxon = Buellia griseovirens
| taxon = Buellia griseovirens
| parent = Buellia
| parent = Buellia
| authority = Turner & Borrer ex Sm., Almb
| authority = (Turner & Borrer ex Sm.) Almb.
}}
}}


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== Description ==
== Description ==
The [[thallus]] of ''Buellia griseovirens'' varies from immersed to thick, often greyish with a black [[prothallus]]. It features scattered, crowded, or confluent grey-green [[soralia]], which may have a bluish tinge and turn yellow when abraded. [[Apothecia]] are very rare, appearing as black discs with brownish epithecium. The spores are irregularly 3-septate to sub-muriform.<ref name=":0" /><ref name=":1">{{Cite web |title=Consortium of Lichen Herbaria - Buellia griseovirens |url=https://lichenportal.org/portal/taxa/index.php?tid=54955&taxauthid=1&clid=201 |access-date=2024-03-16 |website=lichenportal.org}}</ref>
The [[thallus]] of ''Buellia griseovirens'' varies from immersed to thick, often pale grey with a black [[prothallus]]. They may be continuous or lacking, sometimes minutely cracked. It features scattered, crowded, or confluent grey-green [[soralia]]. Soralia are numerous, seldom confluent, often forming a mosaic up to 2 mm in diameter. Soredia are farinose, less than 0.01 mm in diameter, initially greenish-grey when freshly gathered, and turning pale yellowish grey upon storage. They are ± delimited in circular, plane, or subconvex soralia.<ref name=":3">{{Cite web |title=Buellia griseovirens (Turner & Borrer ex Sm.) Almb. - Biota of NZ |url=https://biotanz.landcareresearch.co.nz/scientific-names/16f55722-f29c-4320-93e4-d17ac5cb6099 |access-date=2024-03-16 |website=biotanz.landcareresearch.co.nz}}</ref><ref name=":0" />

[[Apothecia]] are very rare. The spores are irregularly 3-septate to sub-muriform.<ref name=":0" /><ref name=":1">{{Cite web |title=Consortium of Lichen Herbaria - Buellia griseovirens |url=https://lichenportal.org/portal/taxa/index.php?tid=54955&taxauthid=1&clid=201 |access-date=2024-03-16 |website=lichenportal.org}}</ref> They are sessile, initially plane with a prominent proper margin, becoming convex and immarginate over time. The epithecium is dark brown. The hymenium is colorless and measures 110-120 [[µm]] tall. The hypothecium is dark brown. Asci are clavate, measuring 110 × 15 µm. Ascospores are pseudomuriform, ellipsoid, and measure (13-)15-28 × 7-13 µm.<ref name=":3" />


== Chemistry ==
== Chemistry ==
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== Distribution ==
== Distribution ==
''Buellia griseovirens'' is distributed in Europe, Mediterranean Africa, the Middle East, and North America, including montane areas of southern California (Riverside and Los Angeles Counties). In Canada, it is found in Alberta, British Columbia, Nova Scotia, Ontario, and the Yukon Territory. In the United States, it occurs in Montana and Wyoming.<ref name=":1" /><ref name=":2">{{Cite web |title=Buellia griseovirens a button lichen |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.126808/Buellia_griseovirens |access-date=2024-03-16 |website=explorer.natureserve.org}}</ref>
''Buellia griseovirens'' is distributed in Europe, Mediterranean Africa, the Middle East, and North America, including montane areas of southern California (Riverside and Los Angeles Counties). In Canada, it is found in Alberta, British Columbia, Nova Scotia, Ontario, and the Yukon Territory. In the United States, it occurs in Montana and Wyoming.<ref name=":1" /><ref name=":2">{{Cite web |title=Buellia griseovirens a button lichen |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.126808/Buellia_griseovirens |access-date=2024-03-16 |website=explorer.natureserve.org}}</ref> It is also found in New Zealand.<ref name=":3" />


== Conservation status ==
== Conservation status ==

Revision as of 20:24, 16 March 2024

Buellia griseovirens
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Caliciales
Family: Caliciaceae
Genus: Buellia
Species:
B. griseovirens
Binomial name
Buellia griseovirens
(Turner & Borrer ex Sm.) Almb.

Buellia griseovirens (a type of Button lichen[1]) is a species[2] of lichen belonging to the family Caliciaceae.[a][3][4] It exhibits a crustose growth type and is commonly found on well-lit, smooth bark, and worked timber surfaces. The species can tolerate moderate pollution.[5]

Description

The thallus of Buellia griseovirens varies from immersed to thick, often pale grey with a black prothallus. They may be continuous or lacking, sometimes minutely cracked. It features scattered, crowded, or confluent grey-green soralia. Soralia are numerous, seldom confluent, often forming a mosaic up to 2 mm in diameter. Soredia are farinose, less than 0.01 mm in diameter, initially greenish-grey when freshly gathered, and turning pale yellowish grey upon storage. They are ± delimited in circular, plane, or subconvex soralia.[6][5]

Apothecia are very rare. The spores are irregularly 3-septate to sub-muriform.[5][3] They are sessile, initially plane with a prominent proper margin, becoming convex and immarginate over time. The epithecium is dark brown. The hymenium is colorless and measures 110-120 µm tall. The hypothecium is dark brown. Asci are clavate, measuring 110 × 15 µm. Ascospores are pseudomuriform, ellipsoid, and measure (13-)15-28 × 7-13 µm.[6]

Chemistry

The chemistry of Buellia griseovirens is characterized by various compounds found in its thallus and medulla. Spot tests reveal that the thallus and medulla turn K+ yellow, indicating the presence of certain chemical compounds. The thallus and medulla also show P+ yellow-orange reaction, while C- reaction is more common, although it may occasionally show C+ orange reaction.[3]

Distribution

Buellia griseovirens is distributed in Europe, Mediterranean Africa, the Middle East, and North America, including montane areas of southern California (Riverside and Los Angeles Counties). In Canada, it is found in Alberta, British Columbia, Nova Scotia, Ontario, and the Yukon Territory. In the United States, it occurs in Montana and Wyoming.[3][1] It is also found in New Zealand.[6]

Conservation status

The conservation status of Buellia griseovirens is assessed by various organizations, including NatureServe. In Canada, the species holds a National Status of N5, denoting its widespread occurrence and overall security. Additionally, it holds a Subnational Status of S5 in British Columbia, indicating its abundance and stability within the province.[1]

Similar species

Buellia griseovirens may be confused with other lichen species such as Mycoblastus fucatus and Mycoblastus caesius due to similarities in appearance. However, they can be distinguished based on chemical composition.[5][3]

Notes and references

Notes

  1. ^ Some sources, such as NatureServe describe the family as Physciaceae.[1]

References

  1. ^ a b c d "Buellia griseovirens a button lichen". explorer.natureserve.org. Retrieved 2024-03-16.
  2. ^ "Buellia griseovirens". iNaturalist United Kingdom. Retrieved 2024-03-17.
  3. ^ a b c d e "Consortium of Lichen Herbaria - Buellia griseovirens". lichenportal.org. Retrieved 2024-03-16.
  4. ^ Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
  5. ^ a b c d "Lichen - Buellia griseovirens". www.dorsetnature.co.uk. Retrieved 2024-03-16.
  6. ^ a b c "Buellia griseovirens (Turner & Borrer ex Sm.) Almb. - Biota of NZ". biotanz.landcareresearch.co.nz. Retrieved 2024-03-16.
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