Habitat and Ecology
Molecular Biology and Genetics
Barcode data: Pinus arizonica
Statistics of barcoding coverage: Pinus arizonica
Public Records: 5
Specimens with Barcodes: 11
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
This species is widespread and common in the Sierra Madre Occidental and on the whole is not in decline despite exploitation for timber. Although two varieties (var. stormiae and var. cooperi) are more restricted and in decline and hence assessed separately, the typical variety makes up the majority of the population so that at the species level, Pinus arizonica is considered Least Concern. The typical variety is not assessed separately, but would be Least Concern like the species.
National NatureServe Conservation Status
Rounded National Status Rank: N2 - Imperiled
NatureServe Conservation Status
Rounded Global Status Rank: G4 - Apparently Secure
Pinus arizonica, commonly known as the Arizona pine, is a medium-sized pine in northern Mexico, southeast Arizona, southwest New Mexico, and western Texas in the United States. It is a tree growing to 25–35 m tall, with a trunk diameter of up 1.2 m (3 ft 11 in). The needles are in bundles of 3, 4, or 5, with 5-needle fascicles being the most prevalent. This variability may be a sign of hybridization with the closely related Ponderosa Pine (Pinus ponderosa). The cones are single, paired, or in whorls of three, and 5–11 cm long.
The Arizona pine had been thought to be a variant of Ponderosa pine by some botanists, but is now recognized as a distinct species by most authorities.
Two varieties are described, possibly better treated as distinct species; see Ponderosa Pine for a table of characters:
- Pinus arizonica var. arizonica, in the Sierra Madre Occidental from Arizona south to Durango
- Pinus arizonica var stormiae, in the Sierra Madre Oriental from the Big Bend National Park in Texas south to San Luis Potosí.
Another related pine, Cooper's Pine (Pinus cooperi) is also treated as a variety of Arizona Pine by some authors, as Pinus arizonica var. cooperi, but other authors regard this as a distinct species, more closely related to Hartweg's Pine (Pinus hartwegii).
This pine is a source of construction timber, and is heavily harvested for firewood. Extensive cutting has reduced the formerly widespread Arizona Pine forests, particularly in Mexico.
- Conifer Specialist Group (1998). Pinus arizonica. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 12 May 2006.
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Names and Taxonomy
Comments: Many botanists and taxonomists consider P. ARIZONICA to be a variety of P. PONDEROSA. They are closely related and quite similar, but number of leaves, resin canals and cone scales prickles differenciate them (Perry, 1991). Kartesz (1994 checklist) maintains this as a distinct species, with two varieties (vars. arizonica and stormiae). FNA (1993) considers it instead a variety of Pinus ponderosa, and does not mention var. stormiae.