Pinus arizonica var. stormiae
Pino real, pino blanco [Spanish] (Perry 1991).
Syn: Pinus ponderosa D. Douglas ex P. Lawson var. stormiae (Martínez) Silba 1990 (Farjon and Styles 1997).
As for Pinus arizonica, except that the needles, 3-4(-5) per fascicle, are quite long (14-25 cm) and thick (1.4-1.8 mm), with 8-12 lines of stomata on the abaxial (outer) side.
Mexico: Coahuila, Nuevo León, southwest Tamaulipas (Miquihuana) and parts of San Luis Potosí (Perry 1991); probably most abundant in southern Nuevo León. Occurs at 1,500-3,000 m elevation, commonly with Quercus, Juniperus, or other pines, particularly P. cembroides and P. pseudostrobus (Farjon and Styles 1997). In Nuevo León I observed that on gypsum-derived soils in was the only tree (photo at right), whereas adjacent carbonate substrates were dominated by P. cembroides but supported a variety of conifers, including P. arizonica var. stormiae. See Pinus arizonica for an interactive distribution map.
Have seen it in the Sierra Peña Nevada of southern Nuevo León, and in extensive stands on the plains south of and at mid-elevations on Cerro Potosí, also in Nuevo León. Within its range it is a common and conspicuous pine.
This species is one of many principal hosts for the dwarf mistletoe Arceuthobium vaginatum subsp. vaginatum, and is also a principal host for A. vaginatum subsp. cryptopodum (Hawksworth and Wiens 1996).
The species account at Threatened Conifers of the World.
Last Modified 2017-12-29