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These are young Guatemalan firs from Cordillera de las Cuchumantes, Guatemala [V. Dinets, e-mail 2003.12.16].

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As above [V. Dinets, e-mail 2003.12.16].

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Cone on Guatemalan fir at the above location [V. Dinets, e-mail 2003.12.16].

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Crowns of trees in habitat, El Salvador [F. de Tobar e-mail 2009.11.20].

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Mature seed cones. Note the foliage emerging from the tip of two of the cones, a rare condition in firs but one that reminds us that the seed cone is, evolutionarily, a highly modified shoot in which bracts represent the leaves [F. de Tobar e-mail 2009.11.20].

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Seed with attached wing [F. de Tobar e-mail 2009.11.20].

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Bark on tree in habitat [F. de Tobar e-mail 2009.11.20].

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Twig with upper surface of foliage [F. de Tobar e-mail 2009.11.20].

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Twig with lower surface of foliage [F. de Tobar e-mail 2009.11.20].

 

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Conservation status

Abies guatemalensis

Rehder 1939

Common names

Guatemalan fir, pashaque fir; Abeto de Guatemala, pinabete, romerillo [Spanish], pacachaque, parchac [indigenous language uncertain](Asociación Becaria Guatemalteca 1995, Williams 1981).

Taxonomic notes

There are two varieties, the type and var. jaliscana Martínez 1948.

Synonymy for the type (Farjon 1998):

Synonymy for var. jaliscana (Farjon 1998):

Also see the Taxonomic notes for A. hickelii.

Description

Trees up to 45 m tall and 100 cm dbh. Primary branches horizontal branches. Bark black-brown, divided into plates. Branchlets red-brown to deep black-red, pubescent. Buds globular-ovoid, resinous, to 5 mm long. Leaves spirally arranged, ±pectinate, linear, dark green above, glaucous beneath, 1.5-5.5 cm × 1.2-2 mm; stomata usually absent above, in 8-10 lines below; resin canals 2, marginal; apex notched and emarginate. Female cones subsessile, oblong-cylindric, apex pointed to somewhat flattened, yellowish-brown with a violet bloom, 8-12 × 4-4.5 cm; scales oblong, broader than long; bracts hidden, about 1/2 length of scale, cuneate-obovoid. Seeds light brown, to 9 mm long, wing to 15 mm long" (Dallimore et al. 1967, Rzedowski 1981, Silba 1986). Flowers May-June (Macvean 2003).

Distribution and Ecology

This has the most southerly distribution of any species in the genus (Donahue et al. 1985). The type variety is in El Salvador, W Guatemala (Quiché, Chichicastenango, Totonicapán, Sololá, Huehuetenango, Quetzaltenango, San Marcos, Jalapa), Honduras (the Santa Barbara Mountains) and Mexico (Chiapas, Colima, Guerrero, Oaxaca, Tamaulipas) (Asociación Becaria Guatemalteca 1995, Farjon 1998) at 1800-4083 m (Silba 1986). A. guatemalensis var. jaliscana in Mexico: Jalisco, Michoacán, Nayarit, and perhaps Sinaloa (Rushforth 1989).

It is a mountain species, associated primarily with Pinus ayacahuite, P. hartwegii, and Cupressus lusitanica (Perry 1991), growing in areas that have annual rainfall of more than 1000 mm in moderately acidic soils, pH 5.4-5.7 (Rzedowski 1981, Donahue et al. 1985). Although remaining stands are protected and cutting is prohibited, its distribution is limited by exploitation (Macvean 2003), including cutting for construction, firewood and charcoal (Donahue et al. 1985).

Hardy to Zone 9 (cold hardiness limit between -6.6°C and -1.1°C) (Bannister and Neuner 2001).

This species is listed as endangered in Mexico under NOM-ECOL-059-94.

Big tree

Oldest

Dendrochronology

Ethnobotany

Illegal extraction of forest products is severely degrading the forest of Los Altos de San Miguel Totonicapán in Guatemala, which is said to harbor the largest and best-conserved stand of Abies guatemalensis in Guatemala (CONAP/INAB, 1999). Commercial harvest of fir branches is prohibited and punishable under Guatemala's Forestry Law (1996), but the high demand for fir branches during Christmas encourages people to illegally harvest this species. An estimated 70% of the firs in the regional forest have been affected to some degree by illegal cutting (ParksWatch 2004).

Observations

Remarks

This species is listed as endangered by the Mexican government (NOM-ECOL-059-94), is listed on Appendix 1 of CITES, and is protected from harvest in Guatemala (ParksWatch 2004).

Donahue et al. (1985, cited in Macvean 2003) state that trees mast about every two years. They recommend collecting cones from November through January, when the cones are nearly mature as shown by purple-green color and the appearance of resin drops. Fully ripe cones quickly disintegrate. To mature cones, keep them in shade for 8 weeks and extract seed. Six hours exposure to sunlight dries the seeds enough to allow long-term storage. Seeds average 35-42,000 per kg. Fresh gemination rate is about 15%, typical for Abies species, and 1 year of cold storage drops germination to 2%. Proper stratification (described by Macvean 2003) can improve germination to over 30%.

Notable pests afflicting this species include bark beetles (Dendroctonus spp.) and seed wasps (Megistimus spp.) (Donahue et al. 1985, Hiratsuka et al. 1995).

Citations

Asociación Becaria Guatemalteca. 1995. Guauhitemala, Lugar de bosques. [City unknown],Guatemala: Editorial Piedra Santa. 67 p. Vol. 1.

CONAP/INAB, 1999. Diagnóstico de las poblaciones de pinabete (Abies guatemalensis R.) en Guatemala y estrategia para su conservación. Consejo Nacional de Áreas Protegidas, Instituto Nacional de Bosques, USAID. Guatemala [cited in ParksWatch 2004].

Donahue, J.K.; Dvorak, W.; Gutierrez, E.; Kane, M. 1985. Abies guatemalensis: a two-year status report. CAMCORE Bulletin. Raleigh, NC: North Carolina State University, School of Forest Resources. 19 p.

Hiratsuka, Y., D.W. Langor, and P.E. Crane. 1995. A field guide to forest insects and diseases of the prairie provinces. Special Report 3. Canada: Canadian Forest Service. 297 p.

Macvean, Ana Lucrecia E. de 2003. Abies guatemalensis. Species description in the Tropical Tree Seed Manual. Available http://www.rngr.net/Publications/ttsm/Folder.2003-07-11.4726 (accessed 2007.08.31).

Rehder, A. 1939. The firs of Mexico and Guatemala. Journal of the Arnold Arboretum 20:281-287.

Rushforth, K.D. 1989. Two new species of Abies (Pinaceae) from western Mexico. Notes RBG Edinb. 46(1):101-109.

Rzedowski, J. 1981. Vegetación de México. México, D.F.: Editorial Limusa. 432 p.

Williams, L.O. 1981. The useful plants of Central America. CEIBA 24(1-2): 265-266.

See also

Farjon (1990) provides a detailed account, with illustrations.

Vidakovic (1991).

Last Modified 2012-11-23