Cathaya: Difference between revisions
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{{Short description|Genus of conifers}} | {{Short description|Genus of conifers}} | ||
{{Expand Finnish|date=January 2025}} | {{Expand Finnish|topic=scitech|date=January 2025}} | ||
{{Speciesbox | {{Speciesbox | ||
| fossil_range = {{Fossil range|30.0|0}} | | fossil_range = {{Fossil range|30.0|0}} | ||
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| status = VU | | status = VU | ||
| status_system = IUCN3.1 | | status_system = IUCN3.1 | ||
| status_ref = <ref name="iucn status 25 September 2021">{{cite iucn |author1=Yang, Y. |author2=Liao, W. |date=2013 |title=''Cathaya argyrophylla'' |volume=2013 | | | status_ref = <ref name="iucn status 25 September 2021">{{cite iucn |author1=Yang, Y. |author2=Liao, W. |date=2013 |title=''Cathaya argyrophylla'' |volume=2013 |article-number=e.T32316A2814173 |doi=10.2305/IUCN.UK.2013-1.RLTS.T32316A2814173.en |access-date=25 September 2021}}</ref> | ||
| display_parents = 2 | | display_parents = 2 | ||
| genus = Cathaya | | genus = Cathaya | ||
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One or two botanists, unhappy with the idea of a new genus in such a familiar family, tried to shoehorn it into other existing genera, as ''Pseudotsuga argyrophylla'' and ''[[Tsuga]] argyrophylla''.<ref name=powocarg/> It is however very distinct from both of these genera, and these combinations are not now used. | One or two botanists, unhappy with the idea of a new genus in such a familiar family, tried to shoehorn it into other existing genera, as ''Pseudotsuga argyrophylla'' and ''[[Tsuga]] argyrophylla''.<ref name=powocarg/> It is however very distinct from both of these genera, and these combinations are not now used. | ||
The species was introduced into Europe and North America in the 1990s.<ref name="TSO">{{cite web | author= | The species was introduced into Europe and North America in the 1990s.<ref name="TSO">{{cite web | author=John Grimshaw & Ross Bayton | title=''Cathaya argyrophylla'' | website=Trees and Shrubs Online | date=2025-02-10 | url=https://www.treesandshrubsonline.org/articles/cathaya/cathaya-argyrophylla/ | access-date=2025-02-10}}</ref> | ||
==Fossil record== | ==Fossil record== | ||
Latest revision as of 22:20, 10 November 2025
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Cathaya is a genus in the pine family, Pinaceae, with one known living species, Cathaya argyrophylla.[1] In foliage and cone morphology, Cathaya has been considered a member of the subfamily Laricoideae, closely related to Pseudotsuga and Larix,[2][3] but more recent genetic studies have suggested a closer relationship to Pinus and Picea in the subfamily Pinoideae.[4][5] A second species, C. nanchuanensis, is now treated as a synonym,[6] as it does not differ from C. argyrophylla in any characters.
Description
Cathaya is confined to a limited area in southern China, in the provinces of Guangxi, Guizhou, Hunan and southeast Sichuan. It is an evergreen tree growing to Template:Cvt tall and a trunk up to Template:Cvt diameter, found on steep, narrow mountain slopes at Template:Cvt altitude on limestone soils.[3] A larger population has been reduced by over-cutting before its scientific discovery and protection in 1950.
The leaves are needle-like, Template:Cvt long, have ciliate (hairy) margins when young, and grow around the stems in a spiral pattern. The cones are Template:Cvt long, with about 15–20 scales, each scale bearing two winged seeds.[3]
One or two botanists, unhappy with the idea of a new genus in such a familiar family, tried to shoehorn it into other existing genera, as Pseudotsuga argyrophylla and Tsuga argyrophylla.[7] It is however very distinct from both of these genera, and these combinations are not now used.
The species was introduced into Europe and North America in the 1990s.[8]
Fossil record
The extinct fossil species Cathaya loehri (Engelhardt & Kinkelin) Chun & Kuang is described from the Miocene and Pliocene of Germany and France;[3] other Cathaya fossils are known from the Miocene and Pliocene of eastern Siberia,[3] and from the early Pleistocene of southern Portugal.[9] They are abundant in European brown coal deposits dating from between 10 and 30 million years ago.[3]
References
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- ↑ Forest Context and Policies in Portugal: Present and Future Challenges by Fernando Reboredo – Springer, 28. aug. 2014 – Template:ISBN
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External links
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