The knobcone pine, Pinus attenuata (also called Pinus tuberculata), is a tree that grows in mild climates on poor soils. It ranges from the mountains of southern Oregon to Baja California with the greatest concentration in northern California and the Oregon-California border.
Description
Individual specimens can live up to a century. The crown is usually conical with a straight trunk. It reaches heights of , but can be a shrub on especially poor sites. The bark is thin and smooth, flaky and gray-brown when young, becoming dark needle-like, yellow-green, twisted, and long. The cones are resin-sealed and irregularly shaped,
The species is susceptible to fire, but this melts the cone resin, releasing seeds for regrowth.