SEEDS!

From the information I gathered from, http://www.nps.gov/grba/planyourvisit/identifying-bristlecone-pines.htm, Pinus longaeva seeds are tucked away inside of their pine cones which are very dense and dark purple, they have to be this way to absorb heat and be able to survive such harsh conditions in such a dry, cold climate high up in the windy mountains. The cones will mature in two years and turn brown with a claw like bristle on the tip of every scale, hence the name "Bristlecone Pine". The cones can be cached by some birds, or they can fall and wait until they bury themselves.