Cathaya
Cathaya is a genus in the pine family, Pinaceae, with one known living species, Cathaya argyrophylla. In foliage and cone morphology, Cathaya has been considered a member of the subfamily Laricoideae, closely related to Pseudotsuga and Larix, but more recent genetic studies have suggested a closer relationship to Pinus and Picea in the subfamily Pinoideae. A second species, C. nanchuanensis, is now treated as a synonym, as it does not differ from C. argyrophylla in any characters.
Species
GENUS
- KingdomPlantae
- PhylumTracheophyta
- ClassPinopsida
- OrderPinales
- FamilyPinaceae
Native toChina South-Central, China Southeast
Cathaya és un gènere d'arbres dins la família Pinaceae i conté en l'actualitat amb una sola espècie: Cathaya argyrophylla. Cathaya és un membre de la subfamília Laricoideae, estretament relacionada amb els gèneres Pseudotsuga i Larix. Una segona espècie, C. nanchuanensis, ara es tracta com el seu sinònim. Cathaya està confinat a una zona limitada del sud de la Xina, a les províncies de Guangxi, Guizhou, Hunan i sud-est de Sichuan. Es troba a les muntanyes a altituds d'entre 950-1800 m en sòls calcaris. Les fules són aciculars de 2,5-5 cm de llarg, tenen els marges ciliats de joves i es disposen espiralment. Les pinyes fan 3-5 cm de llarg i les llavors són alades. S'han trobat fòssils d'aquest gènere a dipòsits de carbó d'Europa datats de 10 a 30 milions d'anys enrere. Referències A Wikimedia Commons hi ha contingut multimèdia relatiu a: Cathaya Conifer Specialist Group (1998). Cathaya argyrophylla. Llista Vermella de la UICN, Unió Internacional per a la Conservació de la Natura, 2006. Consultat el 6 maig 2006 (en anglès). Gymnosperm Database: Cathaya argyrophylla Flora of China: Cathaya argyrophylla
via GBIF · Kew POWO
Article
4 sectionsContents
- Description
- Fossil record
- References
- External links
Cathaya is a genus in the pine family, Pinaceae, with one known living species, Cathaya argyrophylla. In foliage and cone morphology, Cathaya has been considered a member of the subfamily Laricoideae, closely related to Pseudotsuga and Larix, but more recent genetic studies have suggested a closer relationship to Pinus and Picea in the subfamily Pinoideae. A second species, C. nanchuanensis, is now treated as a synonym, 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 tall and a trunk up to diameter, found on steep, narrow mountain slopes at altitude on limestone soils. A larger population has been reduced by over-cutting before its scientific discovery and protection in 1950.