Utah Juniper vs Rocky Mountain Juniper
See associated observations: sample from both trees are shown together:
J. osteosperma sample on the left, J. scopulorum on the right.
samples taken from the observations associated with this post.
J. osteo......................................................J. scop.
single large seed.....................................2 (3) seeds
leaf margins finely...................................leaf margins entire/smooth
denticulate/serrulate
branchlets thicker .................................branchlets slender
stiff, chaotic.............................................less stiff, more elongate, sweeping
Range overlaps substantially, seems to be somewhat sorted by elevation but not entirely. I do not know how consistent this is. Temperature? UV exposure? Seasonal highs or lows? Soil? Moisture?
However, I have found then side-by-side more than once.