
Flora of the Carolinas and Virginia, Working Draft of 1 January 1997 -- Gymnosperms Alan S. Weakley.
Copyright - Alan S. Weakley, 1998, 1999. All Rights Reserved.
References: Taylor in FNA (1993).
1. Cones 2.5-4.5 cm long; upper branches ascending, the lower spreading; outer bud scales prolonged into minute hairlike projections.....P. rubens
1. Cones 10-16 cm long; upper branches spreading to ascending, the lower drooping; outer bud scales without hairlike projections.....P. abies