''Pseudotsuga menziesii var. lindleyana'', commonly known as the Mexican Douglas-fir, is a conifer in the genus '' Pseudotsuga'' that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

. DNA sequence and morphological evidence suggests it is most closely related to

Rocky Mountain Douglas-fir ''Pseudotsuga menziesii'' var. ''glauca'', or Rocky Mountain Douglas-fir, is an evergreen conifer native to the interior mountainous regions of western North America, from central British Columbia and southwest Alberta in Canada southward through ...

(''P. menziesii'' var. ''glauca'') and might best be treated as an additional variety within '' P. menziesii''.

Distribution

''Pseudotsuga menziesii var. lindleyana'' is native to the

Sierra Madre Occidental The Sierra Madre Occidental is a major mountain range system of the North American Cordillera, that runs northwest–southeast through northwestern and western Mexico, and along the Gulf of California. The Sierra Madre is part of the American ...

, Sierra Madre Oriental, and scattered mountains as far south as

Oaxaca Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the political divisions of Mexico, Federative Entities of Mexico. It is ...

. The Mexican Government lists Mexican Douglas-fir as "subject to special protection" because its populations are small, isolated and show signs of low fertility and recruitment due to

inbreeding depression Inbreeding depression is the reduced biological fitness which has the potential to result from inbreeding (the breeding of related individuals). Biological fitness refers to an organism's ability to survive and perpetuate its genetic material. ...

References

External links

The Gymnosperm Database: ''Pseudotsuga lindleyana'' - Old ClassificationThe Gymnosperm Database: ''Pseudotsuga lindleyana in Pseudotsuga menziesii var. glauca'' - New Classification
lindleyana Endemic flora of Mexico Trees of Mexico Flora of Northeastern Mexico Flora of Northwestern Mexico Flora of Central Mexico Flora of the Sierra Madre Occidental Flora of the Sierra Madre Oriental Plants described in 1868 {{conifer-stub