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Cathaya
Temporal range: 30.0–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Conservation status
Vulnerable (IUCN 3.1)[1]
Scientific classification
Kingdom:
Plantae
Clade:
Tracheophytes
Clade:
Gymnospermae
Division:
Pinophyta
Class:
Pinopsida
Order:
Pinales
Family:
Pinaceae
Subfamily:
Laricoideae
Genus:
Cathaya Chun & Kuang
Species:
C. argyrophylla
Binomial name
Cathaya argyrophylla
Chun & Kuang
Cathaya is a genus in the pine family, Pinaceae, with one known living species, Cathaya argyrophylla.[2]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,[3] 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.[4] 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.
^Yang, Y.; Liao, W. (2013). "Cathaya argyrophylla". IUCN Red List of Threatened Species. 2013: e.T32316A2814173. doi:10.2305/IUCN.UK.2013-1.RLTS.T32316A2814173.en. Retrieved 25 September 2021.
^"Cathaya". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-11-07.
^"Cathaya nanchuanensis". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-11-07.
^"Cathaya argyrophylla". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-11-07.
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