Sacred Fir
| Sacred fir | |
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| Sacred fir forest in the mountains of Mexico State | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Pinophyta |
| Class: | Pinopsida |
| Order: | Pinales |
| Family: | Pinaceae |
| Genus: | Abies |
| Species: | A. religiosa |
| Binomial name | |
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Abies religiosa (Kunth) Schltdl. & Cham., 1830 |
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| Synonyms | |
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The sacred fir or Abies religiosa (known as oyamel in Spanish) is a fir native to the mountains of central and southern Mexico (Trans-Mexican Volcanic Belt, Sierra Madre del Sur) and western Guatemala. It grows at high altitudes of 2,100–4,100 metres (6,900–13,500 ft) in cloud forests with cool, humid summers and dry winters in most of its habitat regime. In the state of Veracruz, it grows with precipitation all year long. The tree is resistant to regular winter snowfalls.
The Spanish name "oyamel" comes from the Nahuatl word oyametl (oya, to thresh; metl, agave; literally "threshing agave"). It is also called "árbol de Navidad" (Christmas tree) in Mexico. The English name derives from the binomial Abies religiosa, literally "religious fir". This comes from the use of its cut foliage in religious festivals in Mexico, notably at Christmas.
Abies religiosa is a medium-sized to large evergreen coniferous tree growing to 25–50 m (82–164 ft) tall with a trunk diameter of up to 2 metres (6.6 ft). The leaves are needle-like, flattened, 1.5–3.5 cm (0.59–1.38 in) long and 1.5 mm (0.059 in) wide by 0.5 mm (0.020 in) thick, dark green above, and with two blue-white bands of stomata below; the leaf apex is acute. The leaf arrangement is spiral on the shoot, but with each leaf variably twisted at the base so they lie flat to either side of and above the shoot, with none below the shoot. The shoots are reddish-brown, hairless or with scattered pubescence.
The cones are 8–16 cm (3.1–6.3 in) long and 4–6 cm (1.6–2.4 in) broad, dark blue-purple before maturity; the scale bracts are purple or greenish, of moderate length, with the tips exposed in the closed cone. The winged seeds are released when the cones disintegrate at maturity about 7–9 months after pollination. Trees from the western end of the range on Nevado de Colima, Jalisco have cones with larger, reflexed bract scales (similar to noble fir cones); these are sometimes treated as a separate species, Abies colimensis.
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