1.  Jeffrey pine -  Pinus jeffreyi - 3 gray-green needles per fascicle, reddish brown bark in vertical furrows, smells like butterscotch.  Pineapple-sized cones with scales pointing down or inward.
       

lodgepole    Jeffrey                                     Jeffrey bark              

2.  lodgepole pine - Pinus contorta var. murrayana - two short needles per fascicle, "cornflake" bark.  Small cones < 2" long.

   often in wet or poor soil conditions                 2 needles per fascicle with cone buds

3.  incense-cedar - Calocedrus decurrens  cinnamon red bark, flattened stem branches of scale-like leaves, bases overlapping.

4.  white fir - Abies concolor -  single needles that attach directly to stem that leave a flat scar on tree when removed.  Cones sit erect on upper branches.  Deeply furrowed brown bark on mature trees.  Purplish red bark.