1. Ponderosa Pine
• Jigsaw bark
• Three needles/bundle
• Large pines of basin
• Important wildlife trees
• Dominant pine of high desert
• Logging in basin/west
• Yellow Pine
3. Ecology
• Every western state
• Young trees have dark blackish bark
• Older trees orange yellow bark
• Arid transition zones
• Dry spacious groves
• Extensive horizontal root systems determine
spacing of large trees
4. Ecology continued
• Man and beetle main mortality factors
• 250-500 years
• Studies show that in some areas, 85% of
trees come from abandoned chipmunk
caches
• Bitterbrush and sagebrush important to
survival of young trees(shading)
5. Ecology continued
• Seeds eaten by squirrels, chipmunks, grouse,
nutcrackers, ravens, quail
• Browsing mule deer thin seedlings
• Reproductive maturity reached at 50 years
• Scientific studies show that browsing by cattle is
perhaps the most objectionable deterrent to
satisfactory reproduction of this valuable tree
