Pinus arizonica

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Arizona Pine
Pinus arizonica sapling
Pinus arizonica sapling
Conservation status
Scientific classification
Kingdom: Plantae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Pinaceae
Genus: Pinus
Subgenus: Pinus
Species: P. arizonica
Binomial name
Pinus arizonica
Engelm.
Natural range of Pinus arizonica
green: Pinus arizonica var. arizonica
red: Pinus arizonica var. stormiae
blue: P. ponderosa ssp. brachyptera

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.

Taxonomy[edit]

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.

P. arizonica forest, Mt. Lemmon, AZ

Two varieties are described, possibly better treated as distinct species; see Ponderosa Pine for a table of characters:

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).

Uses[edit]

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.

References[edit]