Английская Википедия:Cathaya
Шаблон:Short description Шаблон:More citations needed Шаблон:Speciesbox
Cathaya is a genus in the pine family, Pinaceae, with one known living species, Cathaya argyrophylla.[1] Cathaya is a member of the subfamily Laricoideae, most closely related to Pseudotsuga and Larix. A second species, C. nanchuanensis, is now treated as a synonym,[2] as it does not differ from C. argyrophylla in any characters.
Cathaya is confined to a limited area in southern China, in the provinces of Guangxi, Guizhou, Hunan and southeast Sichuan. It is found on steep, narrow mountain slopes at 950–1800 m altitude, on limestone soils. A larger population has been reduced by over-cutting before its scientific discovery and protection in 1950.
The leaves are needle-like, 2.5–5 cm long, have ciliate (hairy) margins when young, and grow around the stems in a spiral pattern. The cones are 3–5 cm long, with about 15–20 scales, each scale bearing two winged seeds.
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.[3] It is however very distinct from both of these genera, and these combinations are not now used.
The Butchart Gardens in Victoria, British Columbia had a small living specimen. The tree died in 2017.
Whistling Gardens in Wilsonville, Ontario has a young specimen in its plant collection.
Fossil record
Cathaya sp. fossils are described from the early Pleistocene of southern Portugal.[4] They are abundant in European brown coal deposits dating from between 10 and 30 million years ago.
References
External links
Шаблон:Pinaceae Шаблон:Taxonbar Шаблон:Authority control
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Forest Context and Policies in Portugal: Present and Future Challenges by Fernando Reboredo – Springer, 28. aug. 2014 – Шаблон:ISBN
- Английская Википедия
- Laricoideae
- Endemic flora of China
- Trees of China
- Flora of Guangxi
- Flora of Guizhou
- Flora of Hunan
- Flora of Sichuan
- Extant Rupelian first appearances
- Monotypic conifer genera
- Vulnerable flora of Asia
- Rupelian genus first appearances
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