Pinus durangensis


Pinus durangensis, the Durango pine, is a pine tree species endemic to the Sierra Madre Occidental mountain range of Northwestern Mexico.
This species is related to Pinus ponderosa, and included in the same subsection Ponderosae.

Distribution

The tree is found from Chihuahua and Sonora, southwards through Durango and Jalisco, to Michoacán. It is a moderately high altitude species, growing at.

Description

Pinus durangensis is an evergreen tree reaching in height, with a trunk up to in diameter and a broad, rounded crown. The bark is thick, dark gray-brown, and scaly or fissured.
The leaves are needle-like, dark green, five to seven per fascicle, 14–24 cm long and 0.7-1.1 mm wide, the persistent fascicle sheath 1.5–3 cm long.
The cones are ovoid, 5–9 cm long, green ripening brown, opening when mature in spring to 5–6 cm broad. The seeds are winged, 5–6 mm long with a 1.5-2.5 cm wing. Pollination is in late spring, with the cones maturing 20–22 months after.