Particularly common in poor, dry, sandy soils. Needles in bunches of three, and twisted. Twigs are unwhitened. Has the unusual ability to resprout at various locations along the trunk or at the base of the trunk, following fires. Cones are 4-8 cm long. Some individuals have serotinous cones.
This key was developed by "bt" in June 1982. It was put into HTML format by Stephen Ostermiller in July 1997. Copies of the entire guide in zip format that may be taken to camp on a laptop are available to those who write.