Pinaceae

In our Sky Island region corkbark fir is know only from Mt. Graham and the Santa Catalina mountains, its southernmost range extent. In this region Abies lasiocarpa is threatened and is susceptible to effects from Climate Change as its habitat may move higher in elevation giving the species nowhere to go. Bark beetles, drought, and unnatural fire regimes also threaten the long-term existence of this species in the Sky Islands.

The white fir is the most widespread true fir in the Sky Islands. There are only 3 recorded localities in Sonora, 2 being from the first half of the 1900's. Known in the Sierra de los Ajos and suspected present, but not seen in recent years, in the Sierra El Tigre and Sierra San Jose.