Pinus greggii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Pinopsida Pinales Pinaceae

Scientific Name: Pinus greggii Engelm. ex Parl.
Infra-specific Taxa Assessed:
Common Name(s):
English Gregg’s Pine
Spanish Pino Chino, Pino Garabato, Pino Ocote, Pino Prieto
Taxonomic Source(s): Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.
Taxonomic Notes:

In 1999 it was discovered that the northern (var. greggii) and the southern (var. australis) populations are not only geographically disjunct, but differ morphologically as well as ecologically. This has lead to a split into two taxa, recognized at the rank of variety (Donahue and Lopez 1999). This assessment deals with the entire species.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B2ab(ii,iii,v) ver 3.1
Year Published: 2013
Date Assessed: 2011-06-10
Assessor(s): Farjon, A.
Reviewer(s): Thomas, P. & Perez de la Rosa, J.

Pinus greggii's extent of occurrence is beyond the thresholds for a threatened category. The area of occupancy is more than 500 km2, but less than 2,000 km2. There are a total of eight locations and the population is severely fragmented. A substantial decline has occurred, and is continuing to occur, in the southern subpopulation (var. australis) which represents the majority of the total population. There is a lesser ongoing decline in the northern subpopulation (var. greggii). Consequently the species is assessed as Vulnerable.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Endemic to Mexico: in extreme SE Coahuila, S Nuevo León, SE San Luís Potosí, Querétaro, Hidalgo and N Puebla.
Countries occurrence:
Mexico (Coahuila, Hidalgo, Nuevo León, Puebla, Querétaro, San Luis Potosí)
Additional data:
Estimated area of occupancy (AOO) - km2:592Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:79350
Number of Locations:8
Lower elevation limit (metres):1300
Upper elevation limit (metres):2700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population is in decline throughout its range due to overexploitation of the pine forests in which it occurs.
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:The altitudinal range of this species is 1,300-2,600 m, in the northern part of its distribution 2,300-2,700 m a.s.l. Annual precipitation varies between 600-800 mm in much of its range, except on the eastern escarpment of the mountain ranges along the Hidalgo-Veracruz borderline, where it is 1,000-1,600 mm. In the north it is more often found on slightly alkaline soils (pH 7.0-8.0), in the south on acid soils (pH 4.0-5.0) (Dvorak and Donahue 1992). It is nowhere abundant in its scattered range, and always occurs mixed with e.g. Quercus, Platanus, Liquidambar, and Fraxinus, other pines, e.g. Pinus patula, P. pseudostrobus, P. teocote, P. montezumae, and P. arizonica var. stormiae, with P. cembroides and Juniperus flaccida on dry sites, and at higher and more mesic locations with Abies vejarii, Pseudotsuga menziesii, or Cupressus lusitanica. The serotinous cones indicate adaptation to fire, but no studies on how this affects seed dispersal and germination have been undertaken (or published).
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):30

Use and Trade [top]

Use and Trade: Although locally exploited with other pines, Gregg's Pine is not specifically in demand as a timber tree in Mexico. In many areas it has been severely depleted by general logging and overexploitation of forests. Foresters from abroad are taking an interest in its potential as a forest plantation tree in other countries; it has been introduced for that purpose in (among other countries) India, South Africa, Zimbabwe, Argentina, and Brazil. Like another, and probably related, "closed-cone" pine, P. radiata, it seems to grow much faster in trial plots than several other species (Dvorak and Donahue 1992). Gregg's Pine is rare in cultivation and probably restricted to botanical collections (arboreta), although in Italy it is sometimes planted as an amenity tree.

Threats [top]

Major Threat(s): Deforestation and to a lesser extent general logging in pine forests are the main threats to this species.

Conservation Actions [top]

Conservation Actions: Some locations are within protected areas - Sierra Gorda, Los Marmoles and Cuenca Hidrografica del Rio Necaxa Reserve.

Citation: Farjon, A. 2013. Pinus greggii. The IUCN Red List of Threatened Species 2013: e.T32630A2822678. . Downloaded on 20 April 2018.
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