Biology:Pinus durangensis
| Pinus durangensis | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Pinophyta |
| Class: | Pinopsida |
| Order: | Pinales |
| Family: | Pinaceae |
| Genus: | Pinus |
| Subgenus: | P. subg. Pinus |
| Section: | P. sect. Trifoliae |
| Subsection: | P. subsect. Ponderosae |
| Species: | P. durangensis
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| Binomial name | |
| Pinus durangensis Martínez
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| Natural range of Pinus durangensis | |
Pinus durangensis, the Durango pine, is a pine tree species endemic to the Sierra Madre Occidental mountain range of north-western Mexico.
This species is related to Pinus ponderosa (Ponderosa pine), and included in the same subsection Ponderosae.
Distribution
The tree is found from Chihuahua and Sonora, southwards through Durango and Jalisco, to Michoacán. It is a moderately high altitude species, growing at 1,500–2,800 metres (4,900–9,200 ft).
Description
Pinus durangensis is an evergreen tree reaching 25–40 metres (82–131 ft) in height, with a trunk up to 1 metre (3.3 ft) in diameter and a broad, rounded crown. The bark is thick, dark gray-brown, and scaly or fissured.[2]
The leaves are needle-like, dark green, five to seven per fascicle (mostly six, this high number unique in the genus), 14–24 cm long and 0.7-1.1 mm wide, the persistent fascicle sheath 1.5–3 cm long.[2]
The cones are ovoid, 5–9 cm long, green ripening brown, opening when mature in spring to 5–6 cm broad. The seeds are winged, 5–6 mm long with a 1.5-2.5 cm wing. Pollination is in late spring, with the cones maturing 20–22 months after.
References
- ↑ Farjon, A. (2013). "Pinus durangensis". IUCN Red List of Threatened Species 2013: e.T42358A2974963. doi:10.2305/IUCN.UK.2013-1.RLTS.T42358A2974963.en. https://www.iucnredlist.org/species/42358/2974963. Retrieved 12 November 2021.
- ↑ 2.0 2.1 "Pinus durangensis / Durango pine". https://conifersociety.org/conifers/pinus-durangensis/.[|permanent dead link|dead link}}]
- Farjon, A. (2013). "Pinus durangensis". IUCN Red List of Threatened Species 2013: e.T42358A2974963. doi:10.2305/IUCN.UK.2013-1.RLTS.T42358A2974963.en. https://www.iucnredlist.org/species/42358/2974963. Retrieved 12 November 2021.
- Earle, Christopher J., ed (2018). "Pinus durangensis". http://www.conifers.org/pi/Pinus_durangensis.php.
- Farjon, A. & Styles, B. T. (1997). Pinus (Pinaceae). Flora Neotropica Monograph 75: 171-175.
Wikidata ☰ Q2703193 entry
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