Diario de chauncey

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?