Flora
The chief plant communities are pine forests, pine-oak forests, oak forests, pine-cedar forests, and pine-fir forests. The plant communities vary with elevation and rainfall.
Pine forests are generally found between 2,275 and 2,600 m. Pine-oak forests occur between 2,470 and 2,600 m. Pine-cedar forests can be found above 2,700 m. Pine-fir forests occur above 3000 m.
In the pine forests, Montezuma Pine (Pinus montezumae) is generally predominant, with Smooth-bark Mexican Pine (P. pseudostrobus) predominant in more humid areas, and Hartweg's Pine (P. hartwegii) and P. tecote in dry areas with shallow soils.
Pine-fir forests are composed almost entirely of Hartweg's Pine (Pinus hartwegii) and Sacred Fir (Abies religiosa).
Read more about this topic: Trans-Mexican Volcanic Belt Pine-oak Forests
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